Wearable glasses and method of displaying image via the wearable glasses

ABSTRACT

Provided are wearable glasses including a display and a method of operating the same. The wearable glasses include: a display configured to display an image; a sensor configured to acquire wear state information representing a state in which a user currently wears the wearable glasses, while the image is being displayed on the display; and a processor configured to determine an inclination of the wearable glasses with respect to the user based on the acquired wear state information, and to adjust, based on the determined inclination, the image that is displayed on the display.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This is a continuation of U.S. application Ser. No. 15/941,069 filed onMar. 30, 2018, which is a continuation of U.S. application Ser. No.14/810,652 filed on Jul. 28, 2015 (now U.S. Pat. No. 9,965,030), whichclaims priorities from Korean Patent Application No. 10-2014-0098630,filed on Jul. 31, 2014 in the Korean Intellectual Property Office, andKorean Patent Application No. 10-2015-0020288, filed on Feb. 10, 2015 inthe Korean Intellectual Property Office, the disclosures of which areincorporated herein in their entireties by reference.

BACKGROUND 1. Field

Apparatuses and methods consistent with one or more exemplaryembodiments relate to image display apparatuses and methods, and moreparticularly, to wearable glasses and a method of displaying an image onthe wearable glasses.

2. Description of the Related Art

Wearable glasses are a type of wearable device that is worn on the head,like eyeglasses. In particular, wearable glasses are a type of headmounted display (HMD) that is worn on the head of a user and displays animage in front (e.g., directly in front) of the eyes of the user.

Since wearable glasses are temporarily fixed onto the head of a user bya frame or the like, a location or position of the wearable glasses onthe head of the user may change due to movement of the user. In general,wearable glasses include a near-to-eye display system that displays animage within several centimeters from the eyes of a user. Thus, anoutput image is greatly distorted even by a fine position change of thewearable glasses.

SUMMARY

Aspects of one or more exemplary embodiments provide a system and methodof comparing a wear state of wearable glasses of a user with a referencewear state to determine an inclination of the wearable glasses withrespect to the user, adjusting an output image of the wearable glassesby taking into account the inclination of the wearable glasses, anddisplaying the adjusted image to a display of the wearable glasses.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of exemplary embodiments.

According to an aspect of an exemplary embodiment, there is providedwearable glasses including: a display configured to display an image; asensor configured to acquire wear state information representing a statein which a user currently wears the wearable glasses, while the image isbeing displayed on the display; and a processor configured to determinean inclination of the wearable glasses with respect to the user based onthe acquired wear state information, and to adjust, based on thedetermined inclination, the image that is displayed on the display.

The sensor may be configured to acquire the wear state informationincluding information about a body part of the user; and the processormay be configured to determine the inclination of the wearable glasseswith respect to the user by comparing the acquired wear stateinformation with predetermined reference wear state information.

The sensor may be configured to acquire the wear state informationincluding an image of the body part; and the processor may be configuredto detect an area corresponding to the body part from the image of thebody part, to acquire a property value from the detected area, and tocompare the acquired property value with a reference value included inthe reference wear state information in order to determine theinclination.

The acquired wear state information may include an eye image of an eyeof the user who is wearing the wearable glasses; and the processor maybe configured to acquire at least one value from among a length of amajor axis of the eye, a length of a minor axis of the eye, an angle ofthe major axis of the eye, an angle of the minor axis of the eye, and alocation value of an iris of the user from the eye image, to compare theacquired at least one value with at least one predetermined referencevalue, and to determine the inclination based on a result of thecomparison.

The display may be configured to display a test image; the sensor may beconfigured to acquire the wear state information including an eye imageof an eye of the user on which the test image is reflected; and theprocessor may be configured to detect an area corresponding to the eyeof the user from the eye image, to obtain a reflection image of the testimage within the detected area corresponding to the eye, to compare atleast one of a size and a shape of the obtained reflection image withpredetermined reference wear state information, and to determine theinclination based on a result of the comparison.

The sensor may be configured to obtain a state value representing amovement state of the wearable glasses and to acquire the wear stateinformation when the obtained state value is equal to or greater than apredetermined value.

The processor may be configured to determine whether the determinedinclination is equal to or greater than a predetermined value; when theprocessor determines that the determined inclination is less than thepredetermined value, the processor may be configured to control thedisplay to display the adjusted image obtained based on the determinedinclination; and when the processor determines that the determinedinclination is equal to or greater than the predetermined value, theprocessor may be configured to control the display to display an imageinforming the user to adjust the wearable glasses.

According to an aspect of another exemplary embodiment, there isprovided a method of displaying an image via wearable glasses, themethod including: displaying, on a display of the wearable glasses, animage; acquiring wear state information representing a state in which auser currently wears the wearable glasses; determining an inclination ofthe wearable glasses with respect to the user based on the acquired wearstate information; and adjusting, based on the determined inclination,the image that is displayed on the display.

The acquiring the wear state information may include acquiring the wearstate information including information about a body part of the user;and the determining the inclination may include determining theinclination of the wearable glasses with respect to the user bycomparing the acquired wear state information with predeterminedreference wear state information.

The acquiring the wear state information may include acquiring the wearstate information including an image of the body part; and thedetermining the inclination may include: detecting an area correspondingto the body part from the image of the body part, acquiring a propertyvalue from the detected area, and comparing the acquired property valuewith a reference value included in the reference wear state informationin order to determine the inclination.

The wear state information may include an eye image of an eye of theuser who is wearing the wearable glasses; and the determining theinclination may include: acquiring at least one value from among alength of a major axis of the eye, a length of a minor axis of the eye,an angle of the major axis of the eye, an angle of the minor axis of theeye, and a location value of an iris of the user from the eye image,comparing the acquired at least one value with at least onepredetermined reference value, and determining the inclination based ona result of the comparing.

The displaying the image may include displaying a test image; theacquiring the wear state information may include acquiring the wearstate information including an eye image of an eye of the user on whichthe test image is reflected; and the determining the inclination mayinclude: detecting an area corresponding to the eye of the user from theeye image, obtaining a reflection image of the test image within thedetected area corresponding to the eye, comparing at least one of a sizeand a shape of the reflection image with predetermined reference wearstate information, and determining the inclination based on a result ofthe comparing.

The acquiring the wear state information may include: obtaining a statevalue representing a movement state of the wearable glasses; andacquiring the wear state information when the obtained state value isequal to or greater than a predetermined value.

The adjusting the image may include: determining whether the determinedinclination is equal to or greater than a predetermined value; if thedetermined inclination is equal to or greater than the predeterminedvalue according to the determining, displaying an image informing theuser to adjust the wearable glasses; and if the determined inclinationis less than the predetermined value according to the determining,adjusting the image that is displayed on the display, based on thedetermined inclination.

According to an aspect of another exemplary embodiment, there isprovided a non-transitory computer-readable storage medium havingembodied thereon at least one program including commands for performinga method of displaying an image via wearable glasses, wherein the methodincludes: displaying an image that is provided by the wearable glasses;acquiring wear state information representing a state in which a usercurrently wears the wearable glasses; determining an inclination of thewearable glasses with respect to the user based on the acquired wearstate information; and displaying an adjusted image obtained based onthe determined inclination.

The acquiring the wear state information may include acquiring the wearstate information including information about a body part of the user;and the determining the inclination may include determining theinclination of the wearable glasses with respect to the user bycomparing the acquired wear state information with predeterminedreference wear state information.

The acquiring the wear state information may include acquiring the wearstate information including an image of a body part of the user; and thedetermining the inclination may include: detecting an area correspondingto the body part from the image of the body part, acquiring a propertyvalue from the detected area, and comparing the acquired property valuewith a reference value included in the reference wear state informationin order to determine the inclination.

The displaying the image may include displaying a test image; theacquiring the wear state information may include acquiring the wearstate information including an eye image of an eye of the user on whichthe test image is reflected; and the determining the inclination mayinclude: detecting an area corresponding to the eye of the user from theeye image, obtaining a reflection image of the test image within thedetected area corresponding to the eye, comparing at least one of a sizeand a shape of the reflection image with predetermined reference wearstate information, and determining the inclination based on a result ofthe comparing.

The displaying the adjusted image may include: determining whether thedetermined inclination is equal to or greater than a predeterminedvalue; and in response to the determined inclination being less than thepredetermined value according to the determining, adjusting the imagethat is displayed on the display, based on the determined inclination.

According to an aspect of another exemplary embodiment, there isprovided a device for displaying an image via wearable glasses, thedevice including: a communicator configured to receive, from thewearable glasses, wear state information representing a state in which auser currently wears the wearable glasses, the wear state informationbeing acquired by the wearable glasses; and a controller configured todetermine an inclination of the wearable glasses with respect to theuser based on the received wear state information, and to control toadjust, based on the determined inclination, an image to be displayed ona display of the wearable glasses, wherein the communicator isconfigured to transmit the adjusted image to the wearable glasses, fordisplay on the display of the wearable glasses.

The received wear state information may include information about a bodypart of the user; and the controller may be configured to determine theinclination by comparing the received wear state information withpredetermined reference wear state information.

According to an aspect of another exemplary embodiment, there isprovided a method in which a device displays an image via wearableglasses, the method including: receiving, from the wearable glasses,wear state information representing a state in which a user currentlywears the wearable glasses, the wear state information being acquired bythe wearable glasses; determining an inclination of the wearable glasseswith respect to the user based on the received wear state information;and providing, to the wearable glasses, an adjusted image obtained basedon the determined inclination, for display on the wearable glasses.

According to an aspect of another exemplary embodiment, there isprovided a non-transitory computer readable recording medium havingrecorded thereon a program executable by a computer for performing theabove method.

According to an aspect of another exemplary embodiment, there isprovided wearable glasses including: a display configured to present animage to a user; a sensor configured to acquire information about agesture of the user; and a processor configured to determine anadjustment value based on the acquired information and to adjust, basedon the determined adjustment value, an image that is displayed on thedisplay.

According to an aspect of another exemplary embodiment, there isprovided a method of displaying an image via wearable glasses, themethod including: acquiring information about a gesture of a user;determining an adjustment value, based on the acquired information; andadjusting, based on the determined adjustment value, an image that is tobe displayed on a display of the wearable glasses.

According to an aspect of another exemplary embodiment, there isprovided a non-transitory computer readable recording medium havingrecorded thereon a program executable by a computer for performing theabove method.

According to an aspect of another exemplary embodiment, there isprovided a device for displaying an image via wearable glasses, thedevice including: a communicator configured to receive information abouta gesture of a user from the wearable glasses, the information about thegesture of the user being acquired by the wearable glasses; and acontroller configured to determine an adjustment value based on thereceived information about the gesture and to control to adjust, basedon the determined adjustment value, an image that is displayed via thewearable glasses, wherein the communicator is configured to provide, tothe wearable glasses, an adjusted image corresponding to a result of theimage adjustment, such that the adjusted image is displayed via thewearable glasses.

According to an aspect of another exemplary embodiment, there isprovided a method of displaying an image via wearable glasses, themethod including: obtaining wear state information representing a statein which a user currently wears the wearable glasses; determining aninclination of the wearable glasses with respect to the user based onthe obtained wear state information; and controlling to adjust, based onthe determined inclination, the image for display on a display of thewearable glasses.

The obtained wear state information may include information about a bodypart of the user; and the determining the inclination may includedetermining the inclination of the wearable glasses with respect to theuser by comparing the obtained wear state information with predeterminedreference wear state information.

The obtained wear state information may include an image of the bodypart; and the determining the inclination may include: detecting an areacorresponding to the body part from the image of the body part,acquiring a property value from the detected area, and comparing theacquired property value with a reference value included in the referencewear state information in order to determine the inclination.

The wear state information may include an eye image of an eye of theuser who is wearing the wearable glasses; and the determining theinclination may include: acquiring at least one value from among alength of a major axis of the eye, a length of a minor axis of the eye,an angle of the major axis of the eye, an angle of the minor axis of theeye, and a location value of an iris of the user from the eye image,comparing the acquired at least one value with at least onepredetermined reference value, and determining the inclination based ona result of the comparing.

The controlling to adjust the image may include: determining whether thedetermined inclination is equal to or greater than a predeterminedvalue; and if the determined inclination is less than the predeterminedvalue according to the determining, controlling to adjust the imagebased on the determined inclination.

According to an aspect of another exemplary embodiment, there isprovided a non-transitory computer readable recording medium havingrecorded thereon a program executable by a computer for performing theabove method.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects will become apparent and more readilyappreciated from the following description of exemplary embodiments,taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram for explaining an inconvenience for a userthat wears wearable glasses;

FIGS. 2A, 2B, and 2C are schematic diagrams for explaining wearableglasses that display an adjusted image when the wearable glasses areinclined with respect to a user, according to one or more exemplaryembodiments;

FIGS. 3A and 3B illustrate the exterior of wearable glasses according toan exemplary embodiment;

FIGS. 4A and 4B illustrate the exterior of wearable glasses according toan exemplary embodiment;

FIGS. 5A and 5B illustrate the exterior of wearable glasses according toan exemplary embodiment;

FIG. 6 is a flowchart of a method in which wearable glasses display animage, according to an exemplary embodiment;

FIG. 7 is a diagram for explaining inclinations of wearable glasses withrespect to a user that are determined based on a reference wear state,according to an exemplary embodiment;

FIG. 8 is a flowchart of a method in which wearable glasses acquireinformation about a body part of a user, according to an exemplaryembodiment;

FIG. 9 illustrates a screen on which a guide image for photographing aneye of a user is displayed, according to an exemplary embodiment;

FIGS. 10A and 10B illustrate an example of an eye image of a user thatis acquired via wearable glasses when the wearable glasses are notinclined with respect to the user, according to one or more exemplaryembodiments;

FIGS. 11A, 11B, and 11C illustrate an example of an eye image of a userthat is acquired via wearable glasses when the wearable glasses areinclined with respect to the user, according to one or more exemplaryembodiments;

FIG. 12 is a flowchart of a method in which wearable glasses determinean inclination of the wearable glasses from an eye image of a user,according to an exemplary embodiment;

FIG. 13 is a schematic diagram for describing a first area correspondingto an eye that is determined from a captured eye image of a user,according to an exemplary embodiment;

FIG. 14 is a schematic diagram for describing a second areacorresponding to an iris that is determined from a captured eye image ofa user, according to an exemplary embodiment;

FIG. 15 is a schematic diagram for describing a property value that isacquired from the captured eye image, according to an exemplaryembodiment;

FIGS. 16 and 17 are schematic diagrams for explaining a method in whichwearable glasses determine the inclination of the wearable glasses fromthe eye image, according to an exemplary embodiment;

FIGS. 18 and 19 are flowcharts of methods in which wearable glassesdisplay an adjusted image obtained based on an inclination of thewearable glasses, according to one or more exemplary embodiments;

FIGS. 20, 21A, and 21B are schematic diagrams for explaining adjustmentof an image that is displayed via a display of wearable glasses, basedon an inclination of the wearable glasses, according to one or moreexemplary embodiments;

FIGS. 22A, 22B, and 22C are schematic diagrams for explaining a methodof adjusting an image that is displayed via a display of wearableglasses, based on an inclination of the wearable glasses, according toone or more exemplary embodiments;

FIGS. 23 and 24 illustrate an example of an animation effect that isapplied to an image that is displayed via wearable glasses, according toone or more exemplary embodiments;

FIG. 25 is a flowchart of a method in which wearable glasses shrink anddisplay an adjusted image, according to an exemplary embodiment;

FIG. 26 is a schematic diagram for explaining an image that is shrunkbased on an inclination of wearable glasses and displayed, according toan exemplary embodiment;

FIG. 27 is a flowchart of a method of displaying an image that requestsa user to adjust the wearable glasses, according to an exemplaryembodiment;

FIG. 28 illustrates an example of an image that requests a user toadjust the wearable glasses, according to an exemplary embodiment;

FIG. 29 illustrates an example of an image that guides a user to adjustwearable glasses, according to an exemplary embodiment;

FIG. 30 is a flowchart of a method in which wearable glasses adjust adisplay image, according to an exemplary embodiment;

FIG. 31 is a schematic diagram for explaining a method in which wearableglasses adjust the location and the size of a display image, accordingto an exemplary embodiment;

FIG. 32 is a schematic diagram for explaining a method in which wearableglasses adjust the brightness of a display image, according to anexemplary embodiment;

FIG. 33 is a schematic diagram for explaining a method in which wearableglasses set a reference value to adjust a display image, according to anexemplary embodiment;

FIG. 34 is a schematic diagram for explaining a method in which wearableglasses correct a display image based on a test image that is reflectedfrom an eye of a user, according to an exemplary embodiment;

FIG. 35 is a flowchart of a method in which wearable glasses correct adisplay image based on a test image that is reflected from the eyes of auser, according to an exemplary embodiment;

FIGS. 36A, 36B, and 36C illustrate examples of a test image, accordingto one or more exemplary embodiments;

FIGS. 37A, 37B, and 37C illustrate examples of an image captured byphotographing the eyes of a user on which a test image is reflected byusing wearable glasses, according to one or more exemplary embodiments;

FIG. 38 illustrates an example of an eye image of a user that isacquired via wearable glasses when the wearable glasses are not inclinedwith respect to the user, according to an exemplary embodiment;

FIGS. 39A, 39B, and 39C illustrate examples of an eye image of a userthat is acquired via wearable glasses when the wearable glasses areinclined with respect to the user, according to one or more exemplaryembodiments;

FIG. 40 is a flowchart of a method of determining an inclination ofwearable glasses from an eye image of a user, according to an exemplaryembodiment;

FIG. 41 is a flowchart of a method in which wearable glasses display anadjusted image obtained based on an inclination of the wearable glasses,according to an exemplary embodiment;

FIG. 42 is a schematic diagram for describing property values of theeyes of a user that are measured from a captured eye image of the user,according to an embodiment of the present disclosure;

FIGS. 43A, 43B, and 43C are schematic diagrams for explaining a methodin which wearable glasses determine an inclination of the wearableglasses based on a reflection image of a test image that is included inan eye image of a user, according to one or more exemplary embodiments;

FIGS. 44A and 44B are schematic diagrams for explaining a method inwhich wearable glasses operate based on an eye image, according to oneor more exemplary embodiments;

FIG. 45 is a schematic diagram for explaining a method in which wearableglasses adjust a display image based on a gesture of a user, accordingto an exemplary embodiment;

FIG. 46 is a flowchart of a method in which wearable glasses adjust adisplay image based on a gesture of a user, according to an exemplaryembodiment;

FIG. 47 is a flowchart of a method in which wearable glasses acquireinformation about a gesture of a user, according to an exemplaryembodiment;

FIGS. 48 and 49 illustrate examples of a screen of wearable glasses onwhich a guide image for inducing a gesture of a user is displayed,according to one or more exemplary embodiments;

FIG. 50 is a flowchart of a method in which wearable glasses determinean adjustment value from a gesture image of a user, according to anexemplary embodiment;

FIG. 51 is a schematic diagram for explaining a method in which wearableglasses detect a hand gesture of a user, according to an exemplaryembodiment;

FIGS. 52, 53, and 54 are schematic diagrams for explaining a method inwhich wearable glasses determine an adjustment value for adjusting adisplay image based on a gesture of a user, according to an exemplaryembodiment;

FIGS. 55 and 56 are schematic diagrams for explaining a method in whichwearable glasses adjust a display image based on a gesture of a user,according to one or more exemplary embodiments;

FIG. 57 is a schematic diagram of a system in which a device displays animage via wearable glasses, according to an exemplary embodiment;

FIG. 58 is a flowchart of a method in which a device displays an imagevia wearable glasses, according to an exemplary embodiment;

FIG. 59 is a flowchart of a method in which a device displays an imagevia wearable glasses, according to an exemplary embodiment;

FIGS. 60 and 61 are block diagrams of wearable glasses according to oneor more exemplary embodiments; and

FIGS. 62 and 63 are block diagrams of devices that display an image viawearable glasses, according to one or more exemplary embodiments.

DETAILED DESCRIPTION

Exemplary embodiments are described in detail herein with reference tothe accompanying drawings so that this disclosure may be easilyperformed by one of ordinary skill in the art to which exemplaryembodiments pertain. Exemplary embodiments may, however, be embodied inmany different forms and should not be construed as being limited toexemplary embodiments set forth herein. In the drawings, partsirrelevant to the description are omitted for simplicity of explanation,and like numbers refer to like elements throughout.

Throughout the specification, the terms “comprises” and/or “comprising”or “includes” and/or “including” when used in this specification,specify the presence of stated elements, but do not preclude thepresence or addition of one or more other elements.

The term “display image” denotes an image that is provided to a user viawearable glasses. A display image may include an image previouslydisplayed via wearable glasses, an image currently being displayed viathe wearable glasses, and an image that is to be displayed later via thewearable glasses. The display image may be an image generated by thewearable glasses or an image received from an external device.

Exemplary embodiments will now be described more fully with reference tothe accompanying drawings, in which like reference numerals refer tolike elements throughout. Hereinafter, expressions such as “at least oneof,” when preceding a list of elements, modify the entire list ofelements and do not modify the individual elements of the list.

A head mounted display (HMD) is mounted on the head of a user anddisplays an image in front of (e.g., directly in front of) the eyes ofthe user. For example, like the wearable glasses 10 of FIG. 1, an HMDmay have a shape of eyeglasses. Various exemplary embodiments ofwearable glasses, which are an eyeglasses-type HMD, will be described indetail hereinafter. However, it is understood that one or more otherexemplary embodiments are not limited to wearable glasses. For example,and one or more other exemplary embodiments may be applicable to varioustypes of HMDs that are partially or wholly fixed to the head of a userand display information within the viewing angle of the user. Thewearable glasses 10 are temporarily fixed onto the head of a user by aframe or the like of the wearable glasses 10. Thus, when the user iswearing the wearable glasses 10 for a long time, the position of thewearable glasses 10 on the head of the user may be changed according toa movement of the user or an external environment change.

The wearable glasses 10 may include a near-to-eye display system thatdisplays an image within several centimeters from the eyes of a user.Thus, an output image is greatly distorted even with a minute change inthe position of the wearable glasses 10, such that a distorted image isprovided to the user. In other words, when the wearable glasses 10 areinclined or twisted with respect to the user, the user is provided witha distorted image via an inclined or twisted display.

The distorted image may denote an image that, compared with a referenceimage, has at least one of a changed size, a changed display location,and a changed shape. For example, the reference image denotes an imagethat is provided to a user in a reference wear state in which the userproperly wears wearable glasses 10, and may be previously determined.

Accordingly, the user may have to frequently adjust the position ofwearable glasses every time the user feels discomfort due to a distortedimage.

To address this problem, aspects of one or more exemplary embodimentsprovide a system and method of adjusting a display image based on aninclination of wearable glasses with respect to a user and displaying anadjusted display image via the wearable glasses.

FIGS. 2A, 2B, and 2C are diagrams for explaining an exemplary embodimentin which wearable glasses 10 display an adjusted image by taking intoaccount an inclination of the wearable glasses 10, when the wearableglasses 10 are determined to be inclined according to a comparisonbetween a wear state in which a user wears the wearable glasses 10 and areference wear state. The reference wear state denotes a state in whicha user properly wears wearable glasses 10, and may be previouslydetermined. The reference wear state may be set differently fordifferent users who wear the wearable glasses 10.

The user may be provided with various pieces of information byrecognizing both a display image provided via the wearable glasses 10and a surrounding environment.

FIG. 2A illustrates a case in which the wearable glasses 10 provide adisplay image to a user in a reference wear state in which the userproperly wears the wearable glasses 10. For example, as shown in FIG.2A, the wearable glasses 10 may support a navigation function byproviding an image 12 guiding a path to a destination.

When the user is wearing the wearable glasses 10 for a long time, thestate in which the user wears the wearable glasses 10 on his or her head(e.g., a position of the wearable glasses 10 on the user's head) may bechanged according to a movement of the user or an external environmentchange. As shown in FIG. 2B, as compared with the reference wear stateof FIG. 2A, the wearable glasses 10 may be inclined with respect to theuser.

When the user wears the related art wearable glasses, the user isprovided with an image that has been distorted as the wearable glassesare inclined. In other words, the related art wearable glasses 10 outputan image that has been output by the wearable glasses 10 in thereference wear state, even when the wearable glasses 10 are inclined.For example, as shown in FIG. 2B, when the wearable glasses 10 support anavigation function of guiding a path to a destination, the image 13provided to the user may be visually inclined as compared with an actualsurrounding environment. Therefore, according to the related art, theuser needs to physically adjust the position of the wearable glasses 10in order to receive an undistorted image.

Due to this inconvenience, there is a demand for wearable glasses 10capable of adjusting a display image according to an inclination degreeof the wearable glasses 10 with respect to a user as compared with areference wear state.

As shown in FIG. 2C, as compared with the reference wear state of FIG.2A, wearable glasses 1000 may be inclined with respect to the user.Referring to FIG. 2C, wearable glasses 1000 according to an exemplaryembodiment may output an adjusted image 14 obtained by compensating forthe inclination degree of the wearable glasses 1000 with respect to theuser.

The wearable glasses 1000 may determine the inclination degree of thewearable glasses 1000 as compared with a predetermined reference wearstate. For example, the reference wear state may be a statepredetermined as a state in which the user properly wears the wearableglasses 1000. The wearable glasses 1000 may output an image that hasbeen adjusted according to the inclination degree of the wearableglasses 1000 compared with the predetermined reference wear state.

The wearable glasses 1000 may provide the user with an image 14 that isnot inclined with respect to the user. The wearable glasses 1000 mayadjust a display image 14 according to the inclination degree of thewearable glasses 1000 with respect to the user as compared with thereference wear state, by at least one of rotating the display image 14,moving a location where the display image 14 is displayed, magnifying orshrinking the display image 14, and changing the shape of the displayimage. For example, as shown in FIG. 2C, when the wearable glasses 1000support a navigation function of guiding a path to a destination, thewearable glasses 1000 according to an exemplary embodiment may outputthe adjusted image 14 obtained by compensating for the inclinationdegree of the wearable glasses 10. Thus, the adjusted image 14 providedto the user according to an exemplary embodiment may providepath-guiding information without being inclined as compared with anactual surrounding environment. That is, the adjusted image 14 mayprovide path-guiding information at a location matched with the actualsurrounding environment.

FIGS. 3A and 3B illustrate the exterior of the wearable glasses 1000according to an exemplary embodiment.

Referring to FIGS. 3A and 3B, the wearable glasses 1000 may be amonocular display, although it is understood that one or more otherexemplary embodiments are not limited thereto.

Referring to FIG. 3A, the wearable glasses 1000 may be constructed aseyeglasses that are fixed to the head of a user by using the ears andthe nose of a user. However, the structure of the wearable glasses 1000is not limited to FIGS. 3A and 3B. For example, the wearable glasses1000 may be attached to a Helmet structure, may be constructed asgoggles, may have a headband structure, may have an elastic band, mayattach to another structure or another pair of glasses, etc.

The wearable glasses 1000 of FIG. 3A may include a frame 1010, aprocessor 1200, a camera 1050 (e.g., first camera), audio output units1020 (e.g., audio outputters or audio output devices), a display 1030,user input units 1040 (e.g., user inputters or user input device), and apower supply unit 1600 (e.g., power supply or power supplier). It isunderstood that more or less components than those illustrated in FIG.3A may be included in the wearable glasses 1000.

Some of the components of the wearable glasses 1000 may be built in thewearable glasses 1000, or the other components may be mounted on theexterior of the wearable glasses 1000. For example, the processor 1200and the power supply unit 1600 may be built in the wearable glasses1000. The display 1030 may be mounted on the exterior of the wearableglasses 1000. The components built in the wearable glasses 1000 and thecomponents mounted on the exterior of the wearable glasses 1000 are notlimited to those described above.

The components included in the wearable glasses 1000 are not limited tothose illustrated in FIG. 3A. For example, the wearable glasses 1000 mayfurther include a sensing unit (e.g., sensor) capable of acquiringinformation about the wearable glasses 1000 or surrounding environmentinformation of the wearable glasses 1000, and a communication unit(e.g., communication device, transceiver, transmitter, communicator,etc.) for communicating with an external device. For example, thesensing unit and the communication unit may be built within the wearableglasses 1000.

The frame 1010 may be formed of (e.g., include) a material such asplastic and/or metal, and may include wiring that connects thecomponents of the wearable glasses 1000 to one another.

The frame 1010 of FIG. 3A is integrated with the wearable glasses 1000,but the shape and structure of the frame 1010 are not limited to thoseof FIG. 3A.

For example, the frame 1010 of the wearable glasses 1000 may include aconnection member (e.g., connector) and thus may be constructed suchthat at least a portion of the frame 1010 is bendable. For example, thewearable glasses 1000 may include a bendable frame 1010 and thus may befolded and stored when a user does not use the wearable glasses 1000,thereby minimizing a space occupied by the wearable glasses 1000.

The wearable glasses 1000 may further include an elastic band such thatthe wearable glasses 1000 may be fixed to the head of the userregardless of the size of the head of the user.

The frame 1010 according to an exemplary embodiment may be constructedsuch that a lens 1005 is detachable from the frame 1010. The wearableglasses 1000 may not include the lens 1005. Although the lens 1005 isintegrated with a nose bridge in FIG. 3A, it is understood that one ormore other exemplary embodiments are not limited thereto. For example,the nose bridge of the wearable glasses 1000 may be integrated with theframe 1010.

The lens 1005 may be formed of a transparent material that enables auser to see the actual space via the lens 1005. The lens 1005 may beformed of a material capable of transmitting light that constitutes animage that is displayed on the display 1030. Examples of a material usedto form the lens 1010 may include, but are limited to, glass andplastic, such as polycarbonate.

The processor 1200 may be connected to the wearable glasses 1000 viawires and/or wirelessly. Although the processor 1200 is located on aleft lateral surface of the frame 1010 in FIG. 3A, it is understood thatone or more other exemplary embodiments are not limited thereto. Forexample, the processor 1200 may be located on a right lateral surface ofthe frame 1010 or on a front surface of the wearable glasses 1000 so asto be adjacent to the camera 1050. In general, it is understood that therelative locations of components of the wearable glasses 1000 are notlimited to the exemplary embodiment illustrated in FIG. 3A, and may varyin various exemplary embodiments.

The processor 1200 may receive data from the camera 1050 or the userinput units 1040, analyze the received data, and generate informationthat is to be provided to a user of the wearable glasses 1000 via atleast one of the display 1030 and the audio output units 1020. Theinformation to be provided to the user may include, but is not limitedto, at least one of an image, text, video, and audio.

The camera 1050 may be included in the display 1030, or may be separatefrom the display 1030 and disposed on the frame 1010. The camera 1050may be a camera for use in smartphones, or a small camera such aswebcams. For example, the camera 1050 may be mounted on a location thatis predetermined to be suitable to acquire an image corresponding to agesture of the hands of a user. For example, as shown in FIG. 3A, when auser wears the wearable glasses 1000, the camera 1050 may be mounted ona location adjacent to an eye of the user to thereby capture an imagethat is similar to an image recognized via the eyes of the user.

Each of the user input units 1040 may include, but is not limited to, atleast one of a touch pad operable by a finger of the user, an opticalinput device, a rotatable dial, a joystick, and a button operable by apush manipulation of the user. Although the user input units 1040 arerespectively mounted on both lateral surfaces of the frame 1010 in FIG.3A, it is understood that the user input units 1040 may be positioned atthe other locations on the wearable glasses 1000 according to one ormore other exemplary embodiments.

The user input units 1040 receive a user input. The user input mayinclude user-input data or a user-input signal that generates an eventthat causes the wearable glasses 1000 to start or conclude a certainoperation.

For example, each of the user input units 1040 may include an on/offswitch capable of turning on/off the wearable glasses 1000.Alternatively, the user input units 1040 may receive a user input foradjusting an image that is displayed via the wearable glasses 1000.

As illustrated in FIG. 3A, the display 1030 may be located on a leftupper end of the lens 1005, although it is understood that one or moreother exemplary embodiments are not limited thereto. For example, thedisplay 1030 may be located on a right end of the lens 1005 or may belocated on a lower end of the lens 1005. As shown in FIG. 3A, thedisplay 1030 may be constructed as a semi-transparent optical waveguide(for example, a prism). The display 1030 of FIG. 3A may reflect lightthat is output from a projector built in the wearable glasses 1000, andfocus an image on the foveae of the retinas of the eyes of a user whowears the wearable glasses 1000. However, the display 1030 included inthe wearable glasses 1000 is not limited to FIG. 3A, and the display1030 may display an image near to the eyes of a user by using variousmethods and various structures.

The wearable glasses 1000 according to an exemplary embodiment mayfurther include a microphone. The microphone may receive, for example, avoice of the user and sounds of a surrounding environment of thewearable glasses 1000.

The audio output units 1020 may be constructed as earphones that may bemounted on the ears of the user of the wearable glasses 1000. The audiooutput units 1020 may be fixed onto the wearable glasses 1000 as shownin FIG. 3A, although it is understood that one or more other exemplaryembodiments are not limited thereto. For example, the audio output units1020 may be detachable from the wearable glasses 1000 such that the userof the wearable glasses 1000 may selectively mount the audio outputunits 1020 on his or her ears. For example, each of the audio outputunits 1020 may be constructed as a bone conduction speaker.

In FIG. 3A, the power supply unit 1600 is located on an end of the frame1010 of the wearable glasses 1000. However, it is understood that one ormore other exemplary embodiments are not limited thereto, and the powersupply unit 1600 may be disposed on any of various other locations onthe frame 1010 of the wearable glasses 1000. The power supply unit 1600supplies power for operating the wearable glasses 1000, to eachcomponent. The power supply unit 1600 may include a battery capable ofcharging, and a cable or cable port capable of receiving power from anexternal source.

FIG. 3B illustrates the exterior of the wearable glasses 1000 as viewedby a user when the user wears the wearable glasses 1000.

Referring to FIG. 3B, the wearable glasses 1000 may include a camera1060 (e.g., second camera) that is adjacent to the display 1030 andfaces the user. The wearable glasses 1000 may adjust an image that isdisplayed on the display 1030, based on an image of an eye of the usercaptured by using the camera 1060. However, the location of the camera1060 is not limited to the location shown in FIG. 3B, and may be any ofvarious other locations according to the shapes of the wearable glasses1000 in one or more other exemplary embodiments.

The wearable glasses 1000 may further include an eye tracking camera1070 that faces the user. For example, the eye tracking camera 1070 mayinclude an infrared camera. The eye tracking camera 1070 may detectuser's eyes by tracking the iris of the user. However, the location ofthe eye tracking camera 1070 is not limited to the location shown inFIG. 3B, and may be any of various other locations according to theshapes of the wearable glasses 1000 in one or more other exemplaryembodiments.

Referring to FIGS. 4A and 4B, the wearable glasses 1000 may have amonocular display shape and may be constructed to be fixed on the leftor right side of the head of a user. Descriptions of the components ofthe wearable glasses 1000 of FIGS. 4A and 4B that are the same as givenabove with reference to FIGS. 3A and 3B will not be repeated herein.

Referring to FIG. 4A, the wearable glasses 1000 may be fixed to the headof a user by using one ear of the user and one side of the nose of theuser. The wearable glasses 1000 may be attached to a Helmet structure,although it is understood that one or more other exemplary embodimentsare not limited thereto.

The wearable glasses 1000 of FIG. 4A may include the processor 1200, thecamera 1050, the audio output unit 1020, the display 1030, the userinput unit 1040, and the power supply unit 1600.

As shown in FIG. 4A, the wearable glasses 1000 may be constructed suchthat the lens 1005 executes a function of the display 1030. In thiscase, the lens 1005 may be constructed as a transparent display or asemi-transparent display. When the lens 1005 is constructed as asemi-transparent display, the lens 1005 may be formed of the samematerial as a material used to form at least one optical waveguide (forexample, a prism), an electroluminescent display, an organic lightemitting diode (OLED) display, or a liquid crystal display (LCD),although it is understood that the material of the lens 1005 is notlimited thereto.

FIG. 4B illustrates the exterior of the wearable glasses 1000 as viewedby a user when the user wears the wearable glasses 1000.

Referring to FIG. 4B, the wearable glasses 1000 may include the camera1060 that faces of the user. The wearable glasses 1000 may adjust animage that is displayed on the display 1030, based on an image of an eyeof the user captured by the camera 1060. However, it is understood thatthe location of the camera 1060 is not limited to the location shown inFIG. 4B, and may be any of various other locations according to theshapes of the wearable glasses 1000 in one or more other exemplaryembodiments.

The wearable glasses 1000 may further include the eye tracking camera1070 (e.g., eye tracker) that faces the user. The eye tracking camera1070 may detect a user's eyes by tracking one or both irises of theuser. However, the location of the eye tracking camera 1070 is notlimited to the location shown in FIG. 4B, and may be any of othervarious locations according to the shapes of the wearable glasses 1000.

FIGS. 5A and 5B illustrate the exterior of wearable glasses 1000according to an exemplary embodiment.

Referring to FIGS. 5A and 5B, the wearable glasses 1000 may be abinocular display. Redundant descriptions of the components of thewearable glasses 1000 of FIGS. 5A and 5B that are the same as or similarto those given above with reference to FIGS. 3A, 3B, 4A, and 4B will notbe repeated herein.

The wearable glasses 1000 of FIG. 5A may include the frame 1010, theprocessor 1200, the camera 1050, the audio output units 1020, thedisplay 1030, the user input units 1040, and the power supply unit 1600.

As shown in FIG. 5A, the wearable glasses 1000 may be constructed suchthat the lens 1005 executes a function of the display 1030. In thiscase, the lens 1005 may be constructed as a transparent display or asemi-transparent display. When the lens 1005 is constructed as asemi-transparent display, the lens 1005 may be formed of the samematerial as a material used to form at least one optical waveguide (forexample, a prism), an electroluminescent display, an OLED display, or anLCD, although it is understood that the material of the lens 1005 is notlimited thereto.

FIG. 5B illustrates the exterior of the wearable glasses 1000 as viewedby a user when the user wears the wearable glasses 1000.

Referring to FIG. 5B, the wearable glasses 1000 may include cameras 1060that face the face of the user. The wearable glasses 1000 may adjust animage that is displayed on the display 1030, based on images of one ormore eyes of the user captured by the cameras 1060. However, it isunderstood that the locations and number of the cameras 1060 are notlimited to the locations and number shown in FIG. 5B, and may be any ofvarious other locations or numbers according to the shapes of thewearable glasses 1000. For example, according to another exemplaryembodiment, only one camera 1060 may be provided to capture an image ofthe eye or eyes of the user.

The wearable glasses 1000 may further include the eye tracking cameras1070 that face the face of the user. The eye tracking cameras 1070 maydetect user's eyes by tracking the irises of the user. However, it isunderstood that the locations and number of the eye tracking cameras1070 are not limited to the locations and number shown in FIG. 5B, andmay be any of various other locations and number according to the shapesof the wearable glasses 1000. Furthermore, according to an exemplaryembodiment, the eye tracking cameras 1070 may be omitted, and thecameras 1060 may detect user's eyes, instead of the eye tracking cameras1070.

As described above with reference to FIGS. 3A, 3B, 4A, 4B, 5A, and 5B,the shapes and components of the wearable glasses 1000 may be variouslymodified by one of ordinary skill in the art. It is understood that oneor more other exemplary embodiments are not limited to FIGS. 3A, 3B, 4A,4B, 5A, and 5B, and any of the components of FIGS. 3A, 3B, 4A, 4B, 5A,and 5B may be omitted. That is, more or less components than thoseillustrated in FIGS. 3A, 3B, 4A, 4B, 5A, and 5B may be included in thewearable glasses 1000.

FIG. 6 is a flowchart of a method in which wearable glasses 1000 displayan image, according to an exemplary embodiment.

Referring to FIG. 6, in operation S100, the wearable glasses 1000 maygenerate and display an image.

The wearable glasses 1000 may process and provide an image and displaythe provided image via the display 1030. The image provided by thewearable glasses 1000 may be an image or moving picture that includestext, a chart, a figure, or a color for providing information to a user.However, it is understood that one or more other exemplary embodimentsare not limited thereto. For example, according to another exemplaryembodiment, the image provided by the wearable glasses 1000 may be animage including a user interface (UI) or a graphical user interface(GUI) for an interaction between the user and the wearable glasses 1000.

For example, the wearable glasses 1000 may also display a test image foracquiring wear state information representing a state in which a usercurrently wears the wearable glasses 1000. The wearable glasses 1000 mayoutput the test image and acquire the wear state information from animage of the eyes of the user on which the test image is reflected. Inoperation S200, the wearable glasses 1000 may acquire the wear stateinformation representing a state in which the user currently wears thewearable glasses 1000.

The wearable glasses 1000 may determine a state in which the usercurrently wears the wearable glasses 1000, based on information about abody part of the user who wears the wearable glasses 1000. The wearableglasses 1000 may acquire wear state information including informationabout a body part of the user. The information about the body partacquired by the wearable glasses 1000 may include information about abody part on which the wearable glasses 1000 are worn. For example, theinformation about the body part may include information used todetermine a relative location and angle of the wearable glasses 1000with respect to at least one body part included in the head on which thewearable glasses 1000 are worn. For example, the information about thebody part may include information about at least one of the eyes, nose,ears, and mouth included in the head of the user on which the wearableglasses 1000 are worn.

The wearable glasses 1000 may acquire wear state information includinginformation about a body part of the user that contacts the wearableglasses 1000. For example, when the wearable glasses 1000 include a nosebridge and temples, the wearable glasses 1000 may acquire informationabout at least one of the location and the angle of the nose bridge withrespect to the nose of the user or at least one of the location and theangle of the temples with respect to the ears of the user. The wearableglasses 1000 may determine whether the at least one of the location andthe angle of the nose bridge with respect to the nose of the user or theat least one of the location and the angle of the temples with respectto the ears of the user has changed as compared with the reference wearstate. Based on a result of the determination, the wearable glasses 1000may acquire the information about the state in which the user currentlywears the wearable glasses 1000, based on a location of the wearableglasses 1000 in the reference wear state.

The wearable glasses 1000 may also acquire wear state informationincluding information about a body part of the user that does notcontact the wearable glasses 1000. For example, the wearable glasses1000 may capture an image of the eyes of the user and compare thecaptured eye image with an eye image captured in the reference wearstate. By comparing the captured eye image with an eye image captured inthe reference wear state, the wearable glasses 1000 may acquire theinformation about the state in which the user currently wears thewearable glasses 1000, based on the location of the wearable glasses1000 in the reference wear state.

The wearable glasses 1000 may acquire wear state information includinginformation about whether the location and the angle of at least aportion of the wearable glasses 1000 has changed as compared with thereference wear state in which the user properly wears the wearableglasses 1000.

The wearable glasses 1000 may acquire the wear state information, whichrepresents the state in which the user currently wears the wearableglasses 1000, by using the sensing unit included in the wearable glasses1000, or acquire the wear state information from an external device. Forexample, the wearable glasses 1000 may acquire the wear stateinformation by using at least one of a magnetic sensor, an accelerationsensor, a gyroscope sensor, a proximity sensor, an optical sensor, adepth sensor, an infrared sensor, and an ultrasonic sensor, which isincluded in the wearable glasses 1000.

When the wearable glasses 1000 are initialized or the wearable glasses1000 are turned on, the wearable glasses 1000 may acquire the wear stateinformation representing the state in which the user currently wears thewearable glasses 1000.

Alternatively, when a user input for acquiring the wear stateinformation representing the state in which the user currently wears thewearable glasses 1000 is received, the wearable glasses 1000 may acquirethe wear state information.

Alternatively, when the wearable glasses 1000 greatly move, the wearableglasses 1000 may determine that the location of the wearable glasses1000 with respect to the user is highly likely to be changed. Thus, whenat least one of measurement values representing a movement of thewearable glasses 1000, for example, an acceleration value, a velocityvalue, and an angular momentum, is equal to or greater than a criticalvalue, the wearable glasses 1000 may acquire the wear state informationrepresenting the state in which the user currently wears the wearableglasses 1000.

The wear state information, representing the state in which the usercurrently wears the wearable glasses 1000, may be used to determine aninclination degree of the wearable glasses 1000 with respect to theuser, by being compared with the reference wear state in which the userproperly wears the wearable glasses 1000.

The wearable glasses 1000 may acquire the wear state informationincluding the information about a body part of the user who wears thewearable glasses 1000, in order to determine the inclination degree ofthe wearable glasses 1000 with respect to the user. For example, theinformation about the body part acquired by the wearable glasses 1000may include information about at least one of the eyes, nose, ears,mouth, and hand of the user. The information about the body partacquired by the wearable glasses 1000 may also include an image of thebody part.

As another example, the information about the body part of the user mayinclude information about a gesture of the user. The term “gesture” maydenote a shape of a body part of a user at a certain time point, avariation in the shape of the body part of the user for a certain periodof time, a variation in the location of the body part, or an action ofthe body part. For example, information about a gesture of a user may bean image of a body part of the user at a certain time point, orinformation about a touch input that is input via the user input unit1040.

For example, when the user wears the wearable glasses 1000 by using anose bridge, like how the user wears eyeglasses, the wearable glasses1000 may acquire, as information about the nose of the user, aninclination degree of the wearable glasses 1000 worn on the nose of theuser.

As another example, when the user wears the wearable glasses 1000 byfixing the frame of the wearable glasses 1000 onto the ears of the user,like how the user wears eyeglasses, the wearable glasses 1000 mayacquire, as information about the ears of the user, information aboutrelative locations between the ears of the user.

As another example, the wearable glasses 1000 may acquire an image of atleast one of the eyes of the user as information about the eyes of theuser. The wearable glasses 1000 may acquire an eye image byphotographing the eyes of the user using the camera 1060 included in thewearable glasses 1000. For example, the wearable glasses 1000 mayacquire wear state information including an image captured byphotographing eyes of the user on which a test image is reflected.

A method of acquiring an image of the eyes of a user as informationabout a body part of the user will be described in more detail belowwith reference to FIGS. 8, 9, 10A and 10B, and 11A through 11C.

In operation S300, the wearable glasses 1000 may determine aninclination of the wearable glasses 1000 with respect to the user, byusing the wear state information acquired in operation S200.

The inclination of the wearable glasses 1000 with respect to the userdenotes a degree to which the wearable glasses 1000 that are currentlyworn by the user are inclined based on a predetermined reference wearstate in which the user properly wears the wearable glasses 1000. Inother words, the inclination of the wearable glasses 1000 may denotevariations in the location and the angle of the current wearable glasses1000 from a location and an angle of the wearable glasses 1000 withrespect to the user in the reference wear state. The wearable glasses1000 may determine the inclination of the wearable glasses 1000 withrespect to the user, by comparing the wear state information acquired inoperation S200 with predetermined reference wear state information.

For example, the predetermined reference wear state informationrepresents a state in which the user wears the wearable glasses 1000 ata location that is the most appropriate to receive an image, and thusthe reference wear state information may be pre-stored as a defaultvalue or may be set by the user. A method in which a user sets areference wear state will be described in detail below with reference toFIG. 33.

For example, information about a state in which the user currently wearsthe wearable glasses 1000 may include an image of a body part of theuser. The wearable glasses 1000 may detect an area corresponding to thebody part from the image of the body part and acquire a property valueof the body part from the detected area. The wearable glasses 1000 mayacquire a property value associated with the location, shape, or size ofthe area corresponding to the body part detected from the image of thebody part. The wearable glasses 1000 may determine the inclinationthereof by comparing the acquired property value with a reference valueincluded in the reference wear state information. The reference valueincluded in the reference wear state information may be a property valuedetected from an image of a body part acquired in the reference wearstate. The reference value may be a pre-stored value or a value set bythe user.

The wearable glasses 1000 may map a plurality of reference wear statesand/or a plurality of reference values with a plurality of body partsand store a result of the mapping.

Alternatively, the wearable glasses 1000 may map a plurality ofreference wear states and/or a plurality of reference values with aplurality of users and store a result of the mapping, and thus may usedifferent criteria according to different users in order to compensatefor an inclination of the wearable glasses 1000.

A method of determining the inclination of the wearable glasses 1000from the image of the body part will be described in detail below withreference to FIGS. 12 through 17.

FIG. 7 is a diagram for explaining inclinations of the wearable glasses1000 with respect to a user that are determined based on the referencewear state, according to an exemplary embodiment. An inclination of thewearable glasses 1000 with respect to a user may denote the degree towhich the wearable glasses 1000 worn by the user are inclined ascompared with a predetermined reference wear state.

FIG. 7 illustrates a case in which the wearable glasses 1000 are in areference wear state with respect to a user. The reference wear statedenotes a state in which the wearable glasses 1000 are positioned mostappropriate for the user to receive an image from the wearable glasses1000. The reference wear state may be pre-stored as a default value ormay be set by the user.

For example, the wearable glasses 1000 may acquire, as an inclinationvalue, an angle at which the wearable glasses 1000 are rotated along avirtual axis defined on the space. For example, the inclination of thewearable glasses 1000 with respect to the user may include at least oneof (or all of) a front-back inclination, a top-bottom inclination, and aleft-right inclination that are determined based on three axes definedon the space in the reference wear state of the wearable glasses 1000.The inclination of the wearable glasses 1000 with respect to the usermay denote a relative inclination representing the degree to which thewearable glasses 1000 are inclined with respect to a particular bodypart of the user as compared with the reference wear state.

As shown in FIG. 7, an x-axis, a y-axis, and a z-axis may be definedfrom the wearable glasses 1000, based on when a state in which the usercurrently wears the wearable glasses 1000 is the reference wear state.The x-axis of the wearable glasses 1000 in the reference wear state maybe parallel to the axis where the coronal plane and the transverse planeof the body of the user intersect with each other. The y-axis of thewearable glasses 1000 in the reference wear state may be parallel to theaxis where the sagittal plane and the transverse plane of the body ofthe user intersect with each other. The z-axis of the wearable glasses1000 in the reference wear state may be parallel to the axis where thesagittal plane and the coronal plane of the body of the user intersectwith each other. It is understood that the reference wear state is notlimited to that described above. For example, according to anotherexemplary embodiment, the reference wear state may be changed or mayvary by a setting of the user.

In the present specification, the front-back inclination of the wearableglasses 1000 denotes an angle at which the wearable glasses 1000 arerotated about the x-axis from a location of the wearable glasses 1000with respect to the user in the reference wear state (hereinafter,referred to as a reference location). For example, the x-axis may be anaxis that is parallel to a straight line that connects both eyes of theuser to each other in the reference wear state.

The top-bottom inclination of the wearable glasses 1000 denotes an angleat which the wearable glasses 1000 are rotated about the y-axis from thereference location. For example, the y-axis may be an axis that isparallel to an eye direction in which the user looks straight ahead inthe reference wear state.

The left-right inclination of the wearable glasses 1000 denotes an angleat which the wearable glasses 1000 are rotated from the referencelocation about the z-axis. The z-axis may be an axis that isperpendicular to the x-axis and the y-axis.

For convenience of explanation, a case in which the rotation angles ofthe wearable glasses 1000 about the x-axis, the y-axis, and the z-axisof FIG. 7 are determined as inclinations of the wearable glasses 1000 isillustrated in the present specification. However, it is understood thatone or more other exemplary embodiments are not limited to the case ofFIG. 7, and various methods and various criteria may be used todetermine an inclination degree of the wearable glasses 1000 withrespect to a user.

A method of determining the inclination of the wearable glasses 1000with respect to the user by using the wear state information of the userwill be described in detail below with reference to FIGS. 12 through 17.

The wearable glasses 1000 may determine the inclination of the wearableglasses 1000, based on information about a gesture of the user. Thewearable glasses 1000 may map information about several gestures withinclinations and store a result of the mapping, or store relationscapable of calculating the inclination of the wearable glasses 1000based on the information about the gestures. The wearable glasses 1000may determine the inclination by searching for a pre-stored inclinationbased the acquired information about the gesture of the user, or bycalculating the inclination by using a found relation.

Referring back to FIG. 6, in operation S400, the wearable glasses 1000adjust an image that is displayed on the display 1030, based on thedetermined inclination. The wearable glasses 1000 adjust the image thatis displayed on the display 1030, based on the inclination determinedbased on the reference wear state.

The wearable glasses 1000 may provide the user with a nondistorted imageeven when the wearable glasses 10 are inclined, by adjusting the imagethat is displayed on the display 1030 based on the inclination of thewearable glasses 1000 with respect to the user.

For example, the wearable glasses 1000 may adjust at least one of arotation angle, a size, and a shape of a display image, based on theinclination of the wearable glasses 1000 determined in operation S300.

For example, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the wearable glasses 1000 may adjust the location of a focalpoint on which light output from the projector of the display 1030 isfocused, based on the inclination of the wearable glasses 1000.

The wearable glasses 1000 may perform image adjustment for compensatingfor the inclination of the wearable glasses 1000 (for example,horizontal translation, vertical translation, keystoning, and/or varioustypes of image processing in which an image is corrected so that a usermay not be provided with a distorted image).

For example, when the wearable glasses 1000 are inclined vertically withrespect to the user, e.g., when the top-bottom inclination is determinedas a value that is not 0, the wearable glasses 1000 may compensate forthe top-bottom inclination from the display image. In other words, thewearable glasses 1000 may rotate the display image by the determinedtop-bottom inclination in a direction opposite to the direction in whichthe wearable glasses 1000 are inclined.

Accordingly, a user who uses the wearable glasses 1000 may be providedwith an inclination-compensated image without correcting the location ofthe wearable glasses 1000, even when the state in which the usercurrently wears the wearable glasses 1000 deviates from the referencewear state.

A method of displaying an image adjusted based on the inclination of thewearable glasses 1000 will be described in detail below with referenceto FIGS. 19, 20, 21A and 21B, 22A through 22C, and 23-26.

FIG. 8 is a flowchart of a method in which the wearable glasses 1000acquire information about a body part of a user, according to anexemplary embodiment.

When wear state information representing a state in which the usercurrently wears the wearable glasses 1000 is used to determine a degreeto which the wearable glasses 1000 are inclined compared with thereference wear state, the wearable glasses 1000 may acquire the wearstate information of the user at regular time intervals. For example,the wearable glasses 1000 may photograph the eyes of the user at regulartime intervals in order to acquire the wear state information of theuser.

However, repeatedly acquiring the wear state information of the user maycause overload of a memory capacity and overload of the number ofcalculations of a processor. Therefore, according to an exemplaryembodiment, as shown in FIG. 8, the wearable glasses 1000 may acquirethe wear state information of the user only when a certain event hasoccurred.

Referring to FIG. 8, in operation S210, the wearable glasses 1000 maydetermine whether the wearable glasses 1000 are initialized. Forexample, when the power of the wearable glasses 1000 is turned on or aninitialization input for initializing the wearable glasses 1000 isreceived from the user, the wearable glasses 1000 may be initialized.

When the wearable glasses 1000 are initialized, the wearable glasses1000 may acquire the wear state information of the user, in operationS250. After the wearable glasses 1000 are initialized, the wearableglasses 1000 may acquire the wear state information of the user, basedon a movement state value of the wearable glasses 1000, by performingoperation S220.

In operation S220, the wearable glasses 1000 may measure the movementstate value of the wearable glasses 1000. The movement state valuedenotes a value representing a movement of the wearable glasses 1000.

For example, the wearable glasses 1000 may measure at least one of anacceleration value, a velocity value, and an angular momentum value ofthe wearable glasses 1000, as the movement state value. In operationS230, the wearable glasses 1000 may determine whether the measuredmovement state value is equal to or greater than a predetermined value.When the measured movement state value is equal to or greater than thepredetermined value, the wearable glasses 1000 may acquire the wearstate information, in operation S250. On the other hand, when themeasured movement state value of the wearable glasses 1000 is less thanthe predetermined value, the wearable glasses 1000 may photograph orcapture an image or state of the eyes of the user based on a user inputby performing operation S240.

In operation S240, the wearable glasses 1000 determine whether an inputfor adjusting a display image has been received from the user. When adistorted image is provided to the user due to a change in the locationof the wearable glasses 1000, the user may input to the wearable glasses1000 a command for adjusting the display image based on the degree towhich the wearable glasses 1000 are inclined based on the reference wearstate.

The wearable glasses 1000 may perform operation S240 of determiningwhether the user input for adjusting a display image has been received.When the user input for adjusting a display image has been received, thewearable glasses 1000 may acquire the wear state information, inoperation S250. On the other hand, when the user input for adjusting adisplay image has not been received, the wearable glasses 1000 mayrepeat operations S210 to S240.

In operation S250, the wearable glasses 1000 may acquire the wear stateinformation of the user. The wearable glasses 1000 may output a guideimage to guide the user to look straight ahead, thereby increasing theaccuracy of measurement of the inclination of the wearable glasses 1000.For example, as illustrated in FIG. 9, the wearable glasses 1000 maydisplay, on the display 1030, an image 901 informing a user that theeyes of the user will be photographed for adjustment or that an imagecorrection process is about to start. The wearable glasses 1000 mayphotograph the eyes of the user after outputting the guide image.However, it is understood that one or more other exemplary embodimentsare not limited thereto, and the eyes of the user may be photographedwithout outputting the guide image.

The wearable glasses 1000 may photograph a body part of the user inorder to acquire information about a state in which the user currentlywears the wearable glasses 1000. For example, the wearable glasses 1000may acquire wear state information including an image of an eye of auser who is wearing the wearable glasses 1000. FIGS. 10A, 10B, 11A, 11B,and 11C are examples of images of the eyes of a user captured via thewearable glasses 1000, according to one or more exemplary embodiments.

As shown in FIG. 10A, the wearable glasses 1000 may photograph one eyeof the user. Alternatively, as shown in FIG. 10B, the wearable glasses1000 may photograph both eyes of the user.

FIGS. 10A and 10B illustrate images of the eyes of a user that arecaptured via the wearable glasses 1000 when the wearable glasses 1000are not inclined with respect to the user based on the reference wearstate, according to one or more exemplary embodiments.

FIGS. 11A, 11B, and 11C illustrate images of the eyes of a user that arecaptured via the wearable glasses 1000 when the wearable glasses 1000are inclined with respect to the user based on the reference wear state,according to one or more exemplary embodiments.

FIG. 11A illustrates an example of an image of the eyes of a user thatis captured via the wearable glasses 1000 when the wearable glasses 1000are inclined vertically with respect to the user and thus there is atop-bottom inclination. FIG. 11A illustrates an image of the eyes of auser when the wearable glasses 1000 have rotated about the y-axis of thewearable glasses 1000 in the reference wear state (i.e., an axisparallel to the eye direction in which the user in a reference wearstate sees straight ahead). Compared with the locations of both eyesillustrated in FIG. 10B, the locations and angles of both eyesillustrated in FIG. 11A are changed.

FIG. 11B illustrates an example of an image of the eyes of the user thatis captured via the wearable glasses 1000 when the wearable glasses 1000are inclined right and left with respect to the user and thus there is aright-left inclination. FIG. 11B illustrates an image of the eyes of theuser when the wearable glasses 1000 have rotated about the z-axis of thewearable glasses 1000 in the reference wear state (i.e., an axisperpendicular to the x-axis and the y-axis that are parallel to astraight line that connects the two eyes of the user in the referencewear state to each other).

When the wearable glasses 1000 are inclined right and left with respectto the user and thus a distance from one side of the wearable glasses1000 to an eye of the user increases, the size of the eye displayed onan image of the eye is reduced. When the wearable glasses 1000 isinclined right and left with respect to the user and thus a distancefrom the other side of the wearable glasses 1000 to an eye of the userdecreases, the size of the eye displayed on an image of the eye isincreased. Compared with the locations of both eyes illustrated in FIG.10B, the sizes of both eyes illustrated in FIG. 11B are changed.Referring to FIG. 11B, since the right eye of the user shown on acaptured eye image becomes smaller, the right eye of the user becomesfarther from the right side of the wearable glasses 1000. Since the lefteye of the user shown on the captured eye image becomes larger, the lefteye of the user becomes closer to the left side of the wearable glasses1000. In other words, FIG. 11B illustrates an example of an eye imagecaptured when the wearable glasses 1000 have rotated about the z-axis ofthe wearable glasses 1000 in the reference wear state in the directionin which a right end of the wearable glasses 1000 b becomes farther fromthe user and a left end thereof becomes closer to the user.

The wearable glasses 1000 may acquire an image of the eyes of the useras information about a body part of the user, and determine aninclination of the wearable glasses 1000 with respect to the user byusing the eye image. In this case, the wearable glasses 1000 may acquirethe image of the eyes of the user by directly photographing the eyes ofthe user using the camera included therein or by receiving an image ofthe eyes of the user captured by an external device from the externaldevice.

FIG. 11C illustrates an example of an image of the eyes of a user thatis captured via the wearable glasses 1000 when the wearable glasses 1000have a front-back inclination with respect to the user. That is, FIG.11C illustrates an image of the eyes of a user when the wearable glasses1000 have rotated about the x-axis of the wearable glasses 1000 in thereference wear state. Compared with the locations of both eyesillustrated in FIG. 10B, the locations and angles of both eyesillustrated in FIG. 11A are changed.

FIG. 12 is a flowchart of a method in which the wearable glasses 1000determine the inclination of the wearable glasses 1000 from an image ofthe eyes of a user, according to an exemplary embodiment.

In operation S310, the wearable glasses 1000 may determine a first areacorresponding to an eye of the user from the eye image.

For example, the wearable glasses 1000 may determine the first areacorresponding to an eye of the user, based on a change in at least oneof the brightness and the color of the eye image.

FIG. 13 illustrates an example of an image of the eyes of a user. Thewearable glasses 1000 may determine an area 1301 indicated by a dottedline of FIG. 13, as the first area corresponding to an eye of the user.

In operation S320, the wearable glasses 1000 may determine a second areacorresponding to an iris of the user from the eye image.

For example, the wearable glasses 1000 may determine the second areacorresponding to the iris of the user, based on a change in at least oneof the brightness and the color of the eye image. The wearable glasses1000 may determine the second area within the first area determined inoperation S310 to thereby reduce the number of calculations comparedwith the case where the second area is determined within the entire eyeimage.

FIG. 14 illustrates an example of an image of the eyes of a user. Thewearable glasses 1000 may determine an area 1401 indicated by a dottedline of FIG. 14, as the second area corresponding to the iris of theuser.

The wearable glasses 1000 may further determine an area 1403 (e.g.,third area) corresponding to the pupil of the user or a center 1405 ofthe second area 1401. As shown in FIG. 14, the wearable glasses 1000 mayfurther determine the area 1403 corresponding to the pupil of the useror the center 1405 of the second area 1401 from the eye image.

In operation S330, the wearable glasses 1000 may acquire a propertyvalue of the eye of the user, based on at least one of the first areaand the second area. The property value of the eye of the user mayinclude at least one of a length value of the major axis of the eye, alength value of the minor axis of the eye, a value of an angle at whichthe major axis is rotated, a value of an angle at which the minor axisis rotated, and a value representing the location of the iris of theuser, which are within the eye image.

FIG. 15 is a schematic diagram for describing a property value that isacquired from the captured eye image, according to an exemplaryembodiment.

As shown in FIG. 15, the wearable glasses 1000 may determine, as themajor axis, a line segment 1501 that connects points at which a straightline passing through two focal points of the first area 1301,corresponding to the eye of the user, intersects with the first area1301, and determine a length of the line segment 1501 as a length of themajor axis. When the first area 1301 approximates to an oval, the twofocal points of the first area 1301 may denote two focal points of thefirst area 1301 approximating to an oval.

The wearable glasses 1000 may determine as the minor axis a line segment1503 that perpendicularly bisects the line segment 1501, and determine alength of the line segment 1503 as a length of the minor axis.

The wearable glasses 1000 may acquire the location of a center 1405 ofthe second area 1401 corresponding to the iris of the user, as the valuerepresenting the location of the iris.

The wearable glasses 1000 may acquire the angle of the major axis and/orthe angle of the minor axis, by comparing the angle of the major axisand/or the angle of the minor axis with a horizontal axis and/or avertical axis of the eye image. The horizontal axis and the verticalaxis of the eye image may be the major axis and the minor axis of anarea corresponding to an eye acquired from an eye image of the user thatis captured in the reference wear state.

The wearable glasses 1000 may determine an angle 1505 that is formed bythe major axis of the first area 1301, corresponding to the eye of theuser, and a horizontal axis 1509-3 of the eye image, as the angle of themajor axis. The wearable glasses 1000 may determine an angle 1507 thatis formed by the minor axis of the first area 1301, corresponding to theeye of the user, and a vertical axis 1509-1 of the eye image, as theangle of the minor axis.

Referring back to FIG. 12, in operation S340, the wearable glasses 1000may determine the inclination of the wearable glasses 1000 with respectto the user, based on the acquired property value. For example, thewearable glasses 1000 may determine the inclination thereof by comparingthe acquired property value with a reference value included in referencewear state information. The reference value included in the referencewear state information may be a property value that is detected from animage of a body part that is acquired when the state in which the usercurrently wears the wearable glasses 1000 is the reference wear state.The reference value may be a predetermined value or a value set by theuser.

FIGS. 16 and 17 are schematic diagrams for explaining a method in whichthe wearable glasses 1000 determine the inclination of the wearableglasses 1000 from the eye image, according to an exemplary embodiment.

Referring to FIG. 16, the wearable glasses 1000 may extract, as theproperty value, an angle 1601 that is formed by a straight line thatconnects centers 1405-1 and 1405-2 of the irises of both eyes of theuser and the horizontal axis 1509-3 of the eye image. The wearableglasses 1000 may determine a top-bottom inclination thereof by comparingthe acquired property value with the reference value.

For example, when a reference value of the angle between the straightline that connects the centers 1405-1 and 1405-2 of the irises of botheyes of the user and the horizontal axis 1509-3 is 0, the angle 1601between the straight line that connects the centers 1405-1 and 1405-2and the horizontal axis 1509-3 may be determined as the top-bottominclination of the wearable glasses 1000. The wearable glasses 1000 mayadjust at least one of a rotation angle, a size, and a shape of thedisplay image, based on the determined top-bottom inclination of thewearable glasses 1000.

Referring to FIG. 17, the wearable glasses 1000 may extract, as theproperty value, lengths of major axes 1501-1 and 1501-2 of both eyes ofthe user. The wearable glasses 1000 may determine a left-rightinclination thereof by comparing the acquired property value with thereference value. For example, the wearable glasses 1000 may previouslystore the length of a major axis as the reference value. The wearableglasses 1000 may calculate a change in a distance between the wearableglasses 1000 and the user based on the pre-stored length of the majoraxis and a newly measured length of the major axis, and may adjust atleast one selected from a size and a shape of the display image based onthe calculated distance.

FIG. 18 is a flowchart of a method in which the wearable glasses 1000display an image adjusted based on the inclination of the wearableglasses 1000, according to an exemplary embodiment.

Referring to FIG. 18, in operation S410, the wearable glasses 1000 mayadjust a display image by rotating the display image based on theinclination of the wearable glasses 1000. For example, the wearableglasses 1000 may rotate the display image according to an inclination(e.g., a top-bottom inclination) at which the wearable glasses 1000 arerotated about an axis parallel to the eye direction in which the usersees straight ahead, based on the reference wear state.

The wearable glasses 1000 may determine an inclination of the wearableglasses 1000 as compared with the reference wear state, and rotate thedisplay image by the determined inclination in a direction opposite tothe direction in which the wearable glasses 1000 are inclined.

In operation S450, the wearable glasses 1000 display an image adjustedbased on the inclination of the wearable glasses 1000. The wearableglasses 1000 adjust the image that is displayed on the display 1030,based on the inclination determined according to the reference wearstate.

FIGS. 20, 21A, and 21B are schematic diagrams for explaining an imagethat is displayed via the display 1030 based on an inclination of thewearable glasses 1000, according to one or more exemplary embodiments.As shown in FIGS. 20, 21A, and 21B, the wearable glasses 1000 maydisplay an image on the display 1030 by using a prism method. However,it is understood that one or more other exemplary embodiments are notlimited thereto. For example, according to one or more other exemplaryembodiments, the wearable glasses 1000 may display an image via thedisplay 1030 according to the monocular display method of FIGS. 4A and4B, the binocular display method of FIGS. 5A and 5B, or a method similarthereto.

FIG. 20 illustrates a case where a user in the reference wear statewears the wearable glasses 1000. As shown in FIG. 20, the wearableglasses 1000 may provide an image 2001 to the user via the display 1030.

FIG. 21A illustrates a case of adjusting an image that is displayed onthe display 1030, based on the inclination of the wearable glasses 1000when the wearable glasses 1000 are inclined as compared with thereference wear state.

When the wearable glasses 1000 are inclined as compared with thereference wear state about an axis parallel to the eye direction inwhich the user sees straight ahead, the wearable glasses 1000 maydetermine an angle θ of rotation of the wearable glasses 1000, as atop-bottom inclination of the wearable glasses 1000. As shown in FIG.21A, the wearable glasses 1000 may display an image 2101 rotated by thedetermined top-bottom inclination in a direction opposite to thedirection in which the wearable glasses 1000 are inclined.

FIG. 19 is a flowchart of a method in which the wearable glasses 1000display an image adjusted based on an inclination of the wearableglasses 1000, according to an exemplary embodiment.

Referring to FIG. 19, in operation S420, the wearable glasses 1000adjust at least one of a size, a rotation angle, and a shape of adisplay image, based on the inclination of the wearable glasses 1000.For example, when a distance from the user to the wearable glasses 1000varies based on the reference wear state, the wearable glasses 1000 mayadjust the size of a display image. Alternatively, the wearable glasses1000 may determine an inclination at which the wearable glasses 1000 areinclined about a predetermined axis as compared with the reference wearstate, and rotate the display image in a direction opposite to thedirection in which the wearable glasses 1000 are inclined.Alternatively, when at least one of the location and the angle of thewearable glasses 1000 varies as compared with the reference wear state,the wearable glasses 1000 may adjust the shape of the display image suchthat the user may be provided with a nondistorted image.

In operation S450, the wearable glasses 1000 display an image adjustedbased on the inclination of the wearable glasses 1000.

FIG. 21B illustrates a case of adjusting an image that is displayed viathe display 1030, based on a variation in the location of the wearableglasses 1000 when the wearable glasses 1000 become farther from the useras compared with the reference wear state.

When the wearable glasses 1000 become farther from the user as comparedwith the reference wear state, the user is provided with an image thatis smaller than an image that is provided in the reference wear state.Thus, the wearable glasses 1000 may display an image 2103 that has beenmagnified based on the distance by which the wearable glasses 1000become farther from the user.

FIG. 21B illustrates a case where the wearable glasses 1000 use a prismthat projects an image to one eye of a user. However, it is understoodthat one or more other exemplary embodiments are not limited to thewearable glasses 1000 illustrated in FIG. 21B. In the case of thewearable glasses 1000 constructed as a binocular display as shown inFIGS. 5A and 5B, when the wearable glasses 1000 are inclined right andleft with respect to the user and thus a left-right inclination exists,a distance from one side of the wearable glasses 1000 to the eyes of theuser differs from a distance from the other side of the wearable glasses1000 and the eyes of the user.

When the wearable glasses 1000 are inclined right and left with respectto the user, the wearable glasses 1000 may determine an angle at whichthe wearable glasses 1000 are inclined right and left with respect tothe user, as a left-right inclination thereof.

For example, as shown in FIG. 17, the wearable glasses 1000 maydetermine the left-right inclination of the wearable glasses 1000, basedon the lengths of the major axes 1501-1 and 1501-2 of both eyes of theuser. When the wearable glasses 1000 are inclined right and left withrespect to the user, a distance from one side of the wearable glasses1000 to an eye of the user may vary. Accordingly, as shown in FIG. 17,when the distance from one side of the wearable glasses 1000 to the eyeof the user increases, the size of the eye shown on an image of the eyebecomes smaller. When a distance from the other side of the wearableglasses 1000 to an eye of the user decreases, the size of the eye shownon the image of the eye becomes larger.

The wearable glasses 1000 may determine a left-right inclination of thewearable glasses 1000 as compared with the reference wear state, and mayadjust the size of a display image by the determined left-rightinclination. For example, the wearable glasses 1000 may estimate avariation in the distance from the wearable glasses 1000 to an eye ofthe user, based on the left-right inclination. The wearable glasses 1000may adjust the size of the display image, based on the estimateddistance variation.

The wearable glasses 1000 may perform image adjustment based on theinclination of the wearable glasses 1000 (for example, horizontaltranslation, vertical translation, keystoning, and/or various types ofimage processing in which a display image is corrected such that a usermay be provided with a nondistorted image).

A method in which the wearable glasses 1000 adjust an image that isdisplayed on the display 1030, according to one or more exemplaryembodiments, will now be described in detail with reference to FIGS.22A, 22B, and 22C.

The wearable glasses 1000 may determine a variation in the location ofthe wearable glasses 1000 with respect to a user as compared with thereference wear state. For example, the wearable glasses 1000 maydetermine an inclination thereof as compared with the reference wearstate.

The wearable glasses 1000 may adjust the image that is displayed via thedisplay 1030, based on the determined location variation. The wearableglasses 1000 may display an adjusted image by remapping the imagedisplayed on the display 1030 by using a conversion formula.

As shown in FIG. 22A, the wearable glasses 1000 may display an image2201 on the display 1030.

When a user is wearing the wearable glasses 1000 for a long time, thelocation of the wearable glasses 1000 on the head of the user may bechanged according to a movement of the user or an external environmentchange. The wearable glasses 1000 may acquire wear state informationrepresenting a state in which the user currently wears the wearableglasses 1000. The wearable glasses 1000 may determine a location changedegree of the wearable glasses 1000 from the acquired wear stateinformation, based on a predetermined reference wear state. The wearableglasses 1000 may calculate or operate in accordance with a conversionformula for adjusting an image that is being displayed via the display1030, based on the determined location change degree.

The conversion formula calculated or used by the wearable glasses 1000may be expressed as Equation 1:dst(x,y)=src(f _(x)(x,y),f _(y)(x,y))  [Equation 1]

where src indicates the original image that is not yet rotated, dstindicates an image that has been rotated, and (x,y) indicatescoordinates of an image. In Equation 1, fx(x,y) indicates a conversionformula for an x-axis value of a predetermined pixel, and fy(x,y)indicates a conversion formula for a y-axis value of the predeterminedpixel.

As shown in FIG. 22A, the wearable glasses 1000 remap each pixelincluded in the image 2201 by applying the conversion formula to theimage 2201, thereby generating and displaying an adjusted image 2203.The wearable glasses 1000 may adjust at least one of a location, arotation angle, a size, and a shape of an image that is being displayed,by applying the conversion formula to the image.

FIG. 22B illustrates a method of adjusting the location of an image thatis provided via the wearable glasses 1000. As shown in FIG. 22B, thewearable glasses 1000 may display an image 2211 on the display 1030.

When a user is wearing the wearable glasses 1000 for a long time, thelocation of the wearable glasses 1000 on the head of the user may bechanged according to a movement of the user or an external environmentchange. When the location of the wearable glasses 1000 on the head ofthe user is changed, the image that is provided via the wearable glasses1000 may deviate from the viewing angle of the user. In particular, whenthe display 1030 of the wearable glasses 1000 is constructed in the formof a prism and the location of the wearable glasses 1000 on the head ofthe user is changed, the location of a focal point on which light outputby the projector of the display 1030 is focused is changed, and thus theuser is provided with a distorted image.

Accordingly, the wearable glasses 1000 may determine a change in thelocation of the wearable glasses 1000 with respect to the user ascompared with the reference wear state, and adjust the image 2211 beingdisplayed based on the determined location change. The wearable glasses1000 may calculate or operate in accordance with a conversion formulafor adjusting the image 2211 being displayed.

A conversion formula calculated or used such that the wearable glasses1000 move an image that is being displayed by k in the x-axis directionand by 1 in the y-axis direction may be expressed as Equation 2:dst(x,y)=src(x+k,y+1)  [Equation 2]

where src indicates the original image that has not yet changed in adisplay location, dst indicates a resultant image that has been changedin a display location, and (x,y) indicates coordinates of an image.

A pixel 2215 denotes a predetermined pixel within the image 2211 that isbeing displayed. FIG. 22B illustrates a case of moving the image 2211being displayed by k in the x-axis direction and by 1 in the y-axisdirection. As shown in FIG. 22B, the pixel 2215 within the image 2211being displayed may be moved by k in the x-axis direction and by 1 inthe y-axis direction and thus may be remapped as a pixel 2217 on thedisplay 1030.

As shown in FIG. 22B, the wearable glasses 1000 remap each pixelincluded in the image 2211 by applying Equation 2 to the image 2211,thereby generating and displaying an adjusted image 2213. FIG. 22Cillustrates a method of rotating an image that is provided via thewearable glasses 1000, at a predetermined angle. As shown in FIG. 22C,the wearable glasses 1000 may display an image 2221 on the display 1030.

When a user is wearing the wearable glasses 1000 for a long time, thelocation of the wearable glasses 1000 on the head of the user may bechanged according to a movement of the user or an external environmentchange. When the wearable glasses 1000 rotate about a predetermined axison the head of the user, the user is provided with a distorted image.

Accordingly, the wearable glasses 1000 may determine an inclination ofthe wearable glasses 1000 with respect to the user as compared with thereference wear state, and adjust an image that is being displayed, basedon the determined inclination. The wearable glasses 1000 may calculate aconversion formula for adjusting the image 2221 that is being displayedvia the display 1030. For example, when the wearable glasses 1000 areinclined about an axis parallel to the eye direction in which the userlooks straight ahead, as compared with the reference wear state, thewearable glasses 1000 may determine an angle θ of rotation of thewearable glasses 1000, as a top-bottom inclination of the wearableglasses 1000. As shown in FIG. 22C, the wearable glasses 1000 maydisplay an image 2223 that has been rotated by the determined top-bottominclination in a direction opposite to the direction in which thewearable glasses 1000 are inclined.

A conversion formula calculated or used such that the wearable glasses1000 rotate an image that is being displayed in the opposite directionby the top-bottom inclination may be expressed as Equation 3 below.

A conversion matrix M for rotating a display image in a directionopposite to the direction in which the wearable glasses 1000 areinclined may be expressed as follows. In other words, M indicates aconversion matrix for rotating the display image by −0°:

$\begin{matrix}{{M = \begin{bmatrix}\alpha & \beta & {{\left( {1 - \alpha} \right) \cdot {center} \cdot x} - {\beta \cdot {center} \cdot y}} \\{- \beta} & \alpha & {{\beta \cdot {center} \cdot x} + {\left( {1 - \alpha} \right) \cdot {center} \cdot y}}\end{bmatrix}}{\alpha = {{scale} \cdot {\cos\left( {- \theta} \right)}}}{\beta = {{scale} \cdot {\sin\left( {- \theta} \right)}}}} & \left\lbrack {{Equation}\mspace{14mu} 3} \right\rbrack\end{matrix}$

In Equation 3, center indicates a center point of the display image thatis to be rotated, and scale indicates a parameter that determines thesize of a resultant image obtained by applying a conversion matrix tothe display image.

A conversion formula calculated or used by applying a conversion matrixto the display image may be expressed as Equation 4:dst(x,y)=src(M ₁₁ x+M ₁₂ y+M ₁₃ ,M ₂₁ x+M ₂₂ y+M ₂₃)  [Equation 4]

where src indicates the original image that is not yet rotated, dstindicates a resultant image that has been rotated, and (x,y) indicatescoordinates of an image. As shown in FIG. 22C, the wearable glasses 1000may generate the image 2223 by rotating the image 2221, which is beingdisplayed, by −θ° from a center point 2225, and display the image 2223.

The wearable glasses 1000 may apply an animation effect to update animage being displayed on the display 1030 with an image adjusted basedon an inclination of the wearable glasses 1000 to display the adjustedimage.

For example, as shown in FIG. 23, the wearable glasses 1000 may apply,to the display image 2301, an animation effect in which a display image2301 is rotated in the direction of an arrow 2305 and displayed.

After image adjustment based on the inclination of the wearable glasses1000 is completed, an image 2401 representing that the image adjustmenthas been completed may be output as shown in FIG. 24.

According to an exemplary embodiment, when the image adjusted based onthe inclination of the wearable glasses 1000 deviates from an area wherethe wearable glasses 1000 may display an image, the adjusted image maybe shrunk and displayed.

FIG. 25 is a flowchart of a method in which the wearable glasses 1000shrink and display an adjusted image, according to an exemplaryembodiment.

Operations S200, S300, and S400 of FIG. 25 respectively correspond tooperations S200, S300, and S400 of FIG. 6, and thus redundantdescriptions thereof will be omitted herein.

As shown in FIG. 25, in operation S430, the wearable glasses 1000 adjustan image that is displayed on the display 1030, based on a determinedinclination.

In operation S440, the wearable glasses 1000 determine whether theadjusted image deviates from the area where the wearable glasses 1000may display an image.

For example, in the wearable glasses 1000 having the display typesillustrated in FIGS. 4A, 4B, 5A, and 5B, the area where the wearableglasses 1000 may display an image may denote an area on the display 1030where light beams and colors corresponding to pixels that constitute animage may be output. As another example, in the wearable glasses 1000having the prism type illustrated in FIGS. 3A and 3B, the area where thewearable glasses 1000 may display an image may denote an area on thedisplay 1030 where light output by the projector of the wearable glasses1000 may be reflected and thus an image may be focused on the foveae ofthe retinas of the eyes of a user who is wearing the wearable glasses1000.

For example, when a display image is rotated based on the inclination ofthe wearable glasses 1000 and an angle of the rotation is equal to orgreater than a predetermined value, the wearable glasses 1000 maydetermine that the adjusted image deviates from the area where thewearable glasses 1000 may display an image.

Alternatively, when the size of a display image is changed based on theinclination of the wearable glasses 1000 and the size of a changeddisplay image is equal to or greater than a predetermined value, thewearable glasses 1000 may determine that the adjusted image deviatesfrom the area where the wearable glasses 1000 may display an image.

When the adjusted image is displayed within the area where the wearableglasses 1000 may display an image, the wearable glasses 1000 may displaythe adjusted image, in operation S470. On the other hand, when theadjusted image deviates from the area where the wearable glasses 1000may display an image, the wearable glasses 1000 may shrink or demagnifythe adjusted image, in operation S460.

FIG. 26 is a schematic diagram for explaining an image that is shrunkbased on an inclination of the wearable glasses 1000 and displayed,according to an exemplary embodiment.

FIG. 26 illustrates a case of adjusting a display image based on atop-bottom inclination of the wearable glasses 1000 with respect to auser, when the wearable glasses 1000 are inclined as compared with thereference wear state illustrated in FIG. 20. When an adjusted image 2601deviates from the area where the wearable glasses 1000 may display animage as indicated by a dotted line of FIG. 26, the wearable glasses1000 may shrink (e.g., demagnify) the adjusted image 2601 and display ashrunk image 2603.

When a location of the wearable glasses 1000 with respect to the user isgreatly changed as compared with the reference wear state, the user maybe provided with a distorted image even when the wearable glasses 1000adjust the display image based on the inclination thereof. In this case,according to an exemplary embodiment, the wearable glasses 1000 mayoutput an image that guides the user to correct the location of the HMD1000.

FIG. 27 is a flowchart of a method in which the wearable glasses 1000display an image that requests a user to adjust the wearable glasses1000, according to an exemplary embodiment.

Operations S200 and S300 of FIG. 27 respectively correspond tooperations S200 and S300 of FIG. 6, and thus redundant descriptionsthereof will be omitted herein.

As shown in FIG. 27, in operation S300, the wearable glasses 1000determine an inclination of the wearable glasses 1000 with respect tothe user.

In operation S350, the wearable glasses 1000 determine whether theinclination of the wearable glasses 1000 determined in operation S300 isequal to or greater than a predetermined value. The predetermined valuemay be a pre-stored value or a value set by the user.

When the determined inclination of the wearable glasses 1000 is lessthan the predetermined value, the wearable glasses 1000 may adjust animage being displayed on the display 1030, based on the determinedinclination, in operation S430. On the other hand, when the determinedinclination of the wearable glasses 1000 is equal to or greater than thepredetermined value, the wearable glasses 1000 may display an image thatinstructs the user to adjust the wearable glasses 1000, in operationS480.

FIG. 28 illustrates an example of an image that requests a user toadjust the wearable glasses 1000, according to an exemplary embodiment.

As shown in FIG. 28, when an inclination of the wearable glasses 1000 isequal to or greater than a predetermined value, the wearable glasses1000 may display on the display 1030 an image 2801 that requests theuser to adjust the wearable glasses 1000. The image 2801 requesting theuser to adjust the wearable glasses 1000 may include an image thatprovides information about a state in which the wearable glasses 1000are properly worn by the user (i.e., a reference wear state).

For example, as shown in FIG. 28, the image 2801 requesting the user toadjust the wearable glasses 1000 may include an image 2803 that guides adirection in which the wearable glasses 1000 is to be adjusted such thatthe state in which the user currently wears the wearable glasses 1000becomes the reference wear state.

In response to the image 2801 requesting the user to adjust the wearableglasses 1000, the user may physically change the location of thewearable glasses 1000. After showing to the user the image 2801requesting the user to adjust the wearable glasses 1000, the wearableglasses 1000 may resume operation S200 in order to repeat adjusting animage based on information about the wear state of the user.

The wearable glasses 1000 may display a guide image that guides the userto adjust the wearable glasses 1000. According to another exemplaryembodiment, the wearable glasses 1000 may simply display an image (e.g.,an icon, a flashing icon, etc.) that alerts the user to adjust thewearable glasses 1000.

FIG. 29 illustrates an example of an image that guides a user to adjustthe wearable glasses 1000, according to an exemplary embodiment.

As shown in FIG. 29, when an inclination of the wearable glasses 1000 isequal to or greater than a predetermined value, the wearable glasses1000 may display on the display 1030 an image 2901 that requests theuser to adjust the wearable glasses 1000. The image 2901 requesting theuser to adjust the wearable glasses 1000 may include a guide image 2905that guides the user to adjust the wearable glasses 1000.

The guide image 2905 may be an image that provides information about thereference wear state. For example, as shown in FIG. 29, the image 2905may guide a direction in which the wearable glasses 1000 are to beadjusted such that the state in which the user currently wears thewearable glasses 1000 becomes the reference wear state.

For example, the guide image 2905 may be an image representing a casewhere the wearable glasses 1000 are in a horizontal state (i.e., thewearable glasses 1000 are perpendicular to the direction of the Earth'sgravity), or an image that is expected to be provided to the user whenthe wearable glasses 1000 are positioned at a reference location. Thereference location denotes a location of the wearable glasses 1000 onthe user when the state in which the user currently wears the wearableglasses 1000 is the reference wear state, and thus may be pre-stored asa default value or set by the user.

For example, the wearable glasses 1000 may display as the guide image2905 an image that is expected to be provided to the user when thewearable glasses 1000 are in a horizontal state, based on the sensingunit (e.g., sensor) built in the wearable glasses 1000.

Thus, as shown in FIG. 29, the user may physically change the locationof the wearable glasses 1000 such that a display image 2903 correspondsto the guide image 2905.

For example, when the guide image 2905 is an image representing a casewhere the wearable glasses 1000 are in a horizontal state, making thedisplay image 2903 and the guide image 2905 correspond to each otherrepresents that the wearable glasses 1000 are positioned in thehorizontal state. Thus, the user may repeat changing the location of thewearable glasses 1000 until the display image 2903 and the guide image2905 correspond to each other, to thereby position the wearable glasses1000 in the horizontal state.

As another example, when the guide image 2905 is an image representing acase where the wearable glasses 1000 are positioned at the referencelocation, making the display image 2903 and the guide image 2905correspond to each other represents that the wearable glasses 1000 arepositioned most appropriate for the user to receive an image. Thus, theuser may repeat changing the location of the wearable glasses 1000 untilthe display image 2903 and the guide image 2905 correspond to eachother, to thereby position the wearable glasses 1000 at the referencelocation.

The wearable glasses 1000 are not limited to the case in which a userchanges the location of the wearable glasses 1000 such that the state inwhich the user currently wears the wearable glasses 1000 becomes thereference wear state. The wearable glasses 1000 may include a drivercapable of changing the state in which the user currently wears thewearable glasses 1000. For example, when the wearable glasses 1000 arein the form of eyeglasses, the wearable glasses 1000 may include thedriver within the temples or the nose bridge and thus correct theinclination of the wearable glasses 1000 with respect to the user.

The wearable glasses 1000 may adjust an image that is displayed on thedisplay 1030, by taking into account, not only the inclination of thewearable glasses 1000, but also at least one of a variation in thelocation of the wearable glasses 1000 and the brightness of an externalenvironment. The wearable glasses 1000 may adjust the brightness of theimage that is displayed on the display 1030, based on the variation inthe location of the wearable glasses 1000 or the brightness of theexternal environment. For example, the wearable glasses 1000 maydetermine the variation in the brightness of the external environment byusing an image of the eyes of the user.

FIG. 30 is a flowchart of a method in which the wearable glasses 1000adjust a display image, according to an exemplary embodiment.

Referring to FIG. 30, in operation S510, the wearable glasses 1000 maydetermine at least one of a movement direction and a movement distanceof the wearable glasses 1000, by using an image of the eyes of a user.

For example, the wearable glasses 1000 may determine a location value ofan eye of the user from the eye image of the user. The wearable glasses1000 may compare the determined location value with a reference valueincluded in the reference wear state information, and determine at leastone of the movement direction and the movement distance of the wearableglasses 1000 based on a result of the comparison.

FIG. 31 is a schematic diagram for explaining a method in which thewearable glasses 1000 adjust the location and the size of a displayimage, according to an exemplary embodiment.

FIG. 31 illustrates a first area 1301 corresponding to an eye of a userand a second area 1401 corresponding to an iris of the user, wherein thefirst area 1301 and the second area 1401 are determined from an eyeimage of the user. FIG. 31 illustrates a case in which the wearableglasses 1000 determine a movement direction and a movement distance ofthe wearable glasses 1000 based on a value representing the location ofthe iris of the user. For example, the wearable glasses 1000 maydetermine the location of a center 1405 of the second area 1401corresponding to the iris of the user, as the value representing thelocation of the iris.

As shown in FIG. 31, the wearable glasses 1000 may compare the location1405 of the iris determined from the eye image of the user with apre-stored reference location 3101 of the iris and may determine atleast one of the movement direction and the movement distance of thewearable glasses 1000 based on a result of the comparison. A movement ofthe wearable glasses 1000 may be represented by an arrow 3103 thatconnects the location 1405 of the iris determined from the eye image ofthe user to the pre-stored reference location 3101 of the iris. In thiscase, a direction indicated by the arrow 3103 may be the movementdirection of the wearable glasses 1000, and the length of the arrow 3103may be the movement distance of the wearable glasses 1000.

Referring back to FIG. 30, in operation S520, the wearable glasses 1000may measure a variation in the size of a pupil of the user by using theeye image of the user.

For example, the wearable glasses 1000 may determine an areacorresponding to the pupil of the user from the eye image of the userand determine a value representing the width of the area correspondingto the pupil of the user. The wearable glasses 1000 may compare thevalue of the area corresponding to the pupil of the user, which has beendetermined from the eye image of the user, with the reference valueincluded in the reference wear state information. The wearable glasses1000 may measure the variation in the size of the pupil of the user,based on a result of the comparison.

FIG. 32 is a schematic diagram for explaining a method in which thewearable glasses 1000 adjust the brightness of a display image,according to an exemplary embodiment.

FIG. 32 illustrates a first area 1301 corresponding to an eye of a user,a second area 1401 corresponding to an iris of the user, and a thirdarea 1403 corresponding to a pupil of the user and included in thesecond area 1401, wherein the first area 1301, the second area 1401, andthe third area 1403 are determined from an eye image of the user.

As shown in FIG. 32, the wearable glasses 1000 may compare the area 1403corresponding to the iris, which has been determined from the eye imageof the user, with a pre-stored area 3201 corresponding to the pupil, andmay measure a variation in the size of the pupil of the user based on aresult of the comparison. Referring to FIG. 32, as indicated by an arrow3203, the size of the pupil of the user is increased.

Referring back to FIG. 30, in operation S530, the wearable glasses 1000may adjust at least one of the location and the size of the displayimage, based on at least one of the movement direction and the movementdistance of the wearable glasses 1000 determined in operation S510.

For example, the wearable glasses 1000 may adjust an image that isdisplayed on the display 1030, such that the wearable glasses 1000 aremoved in a direction opposite to the movement direction of the wearableglasses 1000 and by a distance corresponding to the movement distance ofthe wearable glasses 1000.

When the location of the wearable glasses 1000 with respect to the useris changed, a distance from the eye of the user to the wearable glasses1000 may vary. Accordingly, when the distance from the eye of the userto the wearable glasses 1000 changes, compared with the reference wearstate, the wearable glasses 1000 may display a display image obtained bycompensating for the distance change. For example, when the distancefrom the eye of the user to the display image is increased according toa movement of the wearable glasses 1000, the wearable glasses 1000 maydisplay a display image of which size has been changed by a factorcorresponding to the increased distance.

In operation S540, the wearable glasses 1000 may adjust the brightnessof the display image, based on the variation in the size of the pupil ofthe user measured in operation S520.

For example, when the brightness around the wearable glasses 1000 isincreased, the brightness of the image being displayed on the wearableglasses 1000 also is to be increased so that the user identifies theimage being displayed on the wearable glasses 1000. When the brightnessaround the wearable glasses 1000 is decreased, the brightness of theimage being displayed on the wearable glasses 1000 also is to bedecreased in order to prevent the user from being blinded or to protectthe user from discomfort.

Information about the brightness of an external environment of thewearable glasses 1000 may be directly acquired using a brightness sensorincluded in the wearable glasses 1000. Alternatively (or additionally),the information about the brightness of the external environment of thewearable glasses 1000 may be indirectly acquired based on a variation inthe size of the pupil of the user who wears the wearable glasses 1000.

The wearable glasses 1000 may display a display image of whichbrightness has been adjusted based on the variation in the size of thepupil of the user. For example, when the size of the pupil of the useris increased, the wearable glasses 1000 may determine that thebrightness around the wearable glasses 1000 is decreased, and thusdecrease the brightness of the display image. When the size of the pupilof the user is decreased, the wearable glasses 1000 may determine thatthe brightness around the wearable glasses 1000 is increased, and thusincrease the brightness of the display image.

As another example, the wearable glasses 1000 may provide the user witha display image of which brightness is sufficiently high enough for theuser to identify an image being displayed on the wearable glasses 1000and is still low enough for the user not to feel blinded or discomfort.

Accordingly, when the size of the pupil of the user is increased, thewearable glasses 1000 may determine that the brightness of the displayimage is too low, and thus increase the brightness of the display image.When the size of the pupil of the user is decreased, the wearableglasses 1000 may determine that the brightness of the display image istoo high, and thus decrease the brightness of the display image.

Although FIG. 30 illustrates the case where the wearable glasses 1000adjust a display image by taking into account both the movement of thewearable glasses 1000 and the size of the pupil of a user, it isunderstood that one or more other exemplary embodiments are not limitedthereto. That is, the wearable glasses 1000 may be constructed orconfigured to adjust at least one of the location, the size, and thebrightness of the display image, based on at least one of the movementof the wearable glasses 1000 and the size of the pupil of the user.

According to an exemplary embodiment, a method in which the wearableglasses 1000 display an image described above with reference to FIG. 6may further include an operation of setting a reference wear state,before the wearable glasses 1000 are worn for a long time. The user mayset, as the reference wear state, a state that is determined to be themost appropriate for the user to receive an image from the wearableglasses 1000.

According to an exemplary embodiment, a reference value may be set basedon information about a body part of the user that has been acquired bythe wearable glasses 1000 that is positioned at the reference location.The wearable glasses 1000 may store the reference value as the referencewear state information.

For example, when the information about the body part of the userincludes an image of the eyes of the user, a property value of the eyesof the user that is measured from an eye image of the user that has beencaptured by the wearable glasses 1000 positioned at the referencelocation may be set as the reference value.

FIG. 33 is a schematic diagram for explaining a method in which thewearable glasses 1000 set the reference wear state, according to anexemplary embodiment.

As shown in FIG. 33, when at least a portion of the wearable glasses1000 is touched by a user, the wearable glasses 1000 may determine thatthe user physically moves the wearable glasses 1000 such that thewearable glasses 1000 are positioned at the reference location.

Accordingly, the wearable glasses 1000 may determine, as reference wearstate information, wear state information of the user that has beenacquired by the wearable glasses 1000 at the moment when the user touchis ended or at a time corresponding thereto. The wearable glasses 1000may update pre-stored reference wear state information with newlyacquired wear state information. For example, the wearable glasses 1000may photograph a body part of the user at the moment when the use touchends, and store a captured image as the wear state information.

When the user unintentionally touches the wearable glasses 1000, thewearable glasses 1000 may prevent the reference wear state informationfrom being updated. For example, when a user touch occurs on thewearable glasses 1000, the wearable glasses 1000 may output a graphicaluser interface (GUI) 3301 for asking the user whether to set thereference wear state information based on a current location of thewearable glasses 1000. In this case, only when the wearable glasses 1000receive a user input of setting the reference wear state informationbased on the current location of the wearable glasses 1000, the wearableglasses 1000 may update the reference wear state information.

According to an exemplary embodiment, the wearable glasses 1000 mayfurther consider an image reflected on the eyeball of the user, whenadjusting an image being displayed on the display 1030 based on theinclination of the wearable glasses 1000.

A portion of the light output via the display 1030 of the wearableglasses 1000 may be absorbed by the eyeball of the user, and the usermay recognize a display image from the absorbed light. The other portionof the light output via the display 1030 of the wearable glasses 1000may be reflected by the eyeball of the user.

As shown in FIG. 34, according to an exemplary embodiment, the wearableglasses 1000 adjust a display image based on an image reflected by theeyeball of a user. According to an exemplary embodiment, the wearableglasses 1000 may include the camera 1060 for photographing the eyes ofthe user. An eye image of the user captured by the camera 1060 mayinclude an image 3403 reflected on an eyeball 3401 of the user.

According to an exemplary embodiment, the wearable glasses 1000 maydisplay a test image, and adjust a display image based on a reflectionimage acquired by reflecting a portion of the light constituting thetest image from the eyeball of a user.

FIG. 35 is a flowchart of a method in which the wearable glasses 1000correct a display image based on a test image that is reflected from theeyes of a user, according to an exemplary embodiment.

Referring to FIG. 35, in operation S1100, the wearable glasses 1000display the test image. The test image denotes an image that is used todetermine an inclination of the wearable glasses 1000. For example, thetest image may be an image previously determined to be used to determinethe inclination, or an image that is displayed on the display 1030.

FIGS. 36A, 36B, and 36C illustrate examples of a test image, accordingto one or more exemplary embodiments.

As shown in FIG. 36A, the wearable glasses 1000 may display a test imageincluding a plurality of dots.

As shown in FIG. 36B, the wearable glasses 1000 may display a test imagecomprised of a plurality of line segments.

As shown in FIG. 36C, the wearable glasses 1000 may display a test imageincluding a polygon of a predetermined color.

Referring back to FIG. 35, in operation S1200, the wearable glasses 1000acquire an image captured by photographing the eyes of the user on whichthe test image is reflected. The wearable glasses 1000 may acquire theeye image of the user on which the test image is reflected, asinformation about a state in which the user currently wears the wearableglasses 1000.

For example, the wearable glasses 1000 may output the test image for atime so short that the user cannot recognize the test image, and acquirea reflection image captured by photographing the eyes of the user onwhich the test image is reflected, thereby controlling an operation ofthe wearable glasses 1000 based on the reflection image of the testimage.

FIGS. 37A, 37B, and 37C illustrate examples of an image captured byphotographing the eyes of a user on which a test image is reflected byusing the wearable glasses 1000, according to one or more exemplaryembodiments.

For example, when the wearable glasses 1000 output the test image ofFIG. 36A, the wearable glasses 1000 may photograph the eyes of the useron which the test image of FIG. 36A is reflected, as illustrated in FIG.37A.

As another example, when the wearable glasses 1000 output the test imageof FIG. 36B, the wearable glasses 1000 may photograph the eyes of theuser on which the test image of FIG. 36B is reflected, as illustrated inFIG. 37B.

As another example, when the wearable glasses 1000 output the test imageof FIG. 36C, the wearable glasses 1000 may photograph the eyes of theuser on which the test image of FIG. 36C is reflected, as illustrated inFIG. 37C.

The description of operation S200 of FIG. 6 may be applied to operationS1200 of FIG. 35. A redundant description of operation S1200 of FIG. 35is omitted below.

In operation S1300, the wearable glasses 1000 may determine aninclination of the wearable glasses 1000 with respect to the user, byusing the eye image of the user on which the test image is reflected.

The inclination of the wearable glasses 1000 with respect to the userdenotes the degree to which the wearable glasses 1000 worn by the userare inclined as compared with the reference wear state. The wearableglasses 1000 may determine the inclination of the wearable glasses 1000with respect to the user, by comparing the eye image of the useracquired in operation S1200 with the reference wear state information.The wearable glasses 1000 may store the reference wear state informationincluding an image of the eyes of the user that is acquired in thereference wear state. The wearable glasses 1000 may store, as thereference wear state information, a reflection image of a test imagethat is included in the eye image of the user that is acquired in thereference wear state.

The wearable glasses 1000 may extract the reflection image of the testimage from the eye image of the user. The wearable glasses 1000 maydetermine the inclination of the wearable glasses 1000, based on atleast one of the size and the shape of the reflection image.

For example, the wearable glasses 1000 may determine the inclination ofthe wearable glasses 1000 with respect to the user, by comparing thereflection image extracted from the eye image of the user with areference image.

For convenience of explanation, FIGS. 38, 39A, 39B, 39C, 42, 43A, 43B,43C, 44A, and 44B illustrate cases in which the test image of FIG. 36B,which is rectangular, is displayed. However, it is understood that oneor more other exemplary embodiments are not limited thereto, and variousother test images may be used.

FIG. 38 illustrates an eye image 3801 of a user that is captured by thewearable glasses 1000 when the wearable glasses 1000 are not inclinedwith respect to the user, according to an exemplary embodiment.

As shown in FIG. 38, the eye image 3801 captured by the wearable glasses1000 may include a reflection image 3803 of the test image.

For example, the wearable glasses 1000 may determine a location of thewearable glasses 1000 when the eye image 3801 of FIG. 38 is captured, asthe reference location. The wearable glasses 1000 may set the eye image3801, which is acquired when the wearable glasses 1000 are positioned atthe reference location, as the reference image and may store the eyeimage 3801. Alternatively, the wearable glasses 1000 may set thereflection image 3803, which is acquired when the wearable glasses 1000are positioned at the reference location, as the reference image and maystore the reflection image 3803.

A case where the reflection image 3803 of FIG. 38 is set as thereference image will now be illustrated. FIGS. 39A, 39B, and 39Cillustrate an example of an eye image of a user that is acquired via thewearable glasses 1000 when the wearable glasses 1000 are inclined withrespect to the user, according to one or more exemplary embodiments.

FIG. 39A illustrates a case in which the wearable glasses 1000 areinclined top and bottom with respect to the user and thus a top-bottominclination is measured. A shape of a reflection image 3903 of FIG. 39Ais the same as that of the reflection image 3803 of FIG. 38, but an eyeimage 3901-1 of FIG. 39A is inclined compared with the eye image 3801 ofFIG. 38. Thus, it may be seen that the location of the wearable glasses1000 with respect to the user has changed.

FIG. 39B illustrates a case in which the wearable glasses 1000 areinclined front and back with respect to the user and thus a front-backinclination is measured. A location and a shape of an eye image 3901-2of FIG. 39B are the same as those of the eye image 3801 of FIG. 38, buta shape of a reflection image 3905 of FIG. 39B is different from that ofthe reflection image 3803 of FIG. 38. Thus, it may be seen that thelocation of the wearable glasses 1000 with respect to the user haschanged.

FIG. 39C illustrates a case in which the wearable glasses 1000 areinclined right and left with respect to the user and thus a left-rightinclination is measured. A location and a shape of the eye image 3801 ofFIG. 38 are the same as those of an eye image 3901-3 of FIG. 39C, but ashape of a reflection image 3907 of FIG. 39C is different from that ofthe reflection image 3803 of FIG. 38. Thus, it may be seen that thelocation of the wearable glasses 1000 with respect to the user haschanged.

A method of determining an inclination of the wearable glasses 1000 withrespect to a user by using an eye image of the user will be described indetail below with reference to FIGS. 40 through 42 and 43A through 43C.

Referring back to FIG. 35, in operation S1400, the wearable glasses 1000adjust an image that is displayed on the display 1030, based on thedetermined inclination.

The wearable glasses 1000 may adjust at least one selected of a rotationangle, a size, and a shape of the display image, based on theinclination of the wearable glasses 1000 determined in operation S1300.However, it is understood that one or more other exemplary embodimentsare not limited thereto, and the wearable glasses 1000 may adjustvarious parameters of a display image that is shown to a user.

For example, the wearable glasses 1000 may further adjust at least oneof the brightness of the display image, a location on the display 1030on which the display image is displayed, and the color of the displayimage. As another example, when the display 1030 of the wearable glasses1000 is constructed as a semi-transparent optical waveguide (forexample, a prism), the wearable glasses 1000 may adjust the location ofa focal point on which light output from the projector of the display1030 is focused, based on the inclination of the wearable glasses 1000.

Accordingly, a user who uses the wearable glasses 1000 may be providedwith a nondistorted image without correcting the inclination of thewearable glasses 1000, even when the wearable glasses 1000 are inclinedwith respect to the user.

The description of operation S400 of FIG. 6 may be applied to operationS1400 of FIG. 35. A redundant description of operation S1400 of FIG. 35is omitted below.

The wearable glasses 1000 may display a test image, acquire an image ofthe eyes of a user as wear state information, extract or obtain areflection image of the test image from the eye image of the user, andanalyze the reflection image, thereby determining the inclination of thewearable glasses 1000 with respect to the user.

In this case, the wearable glasses 1000 may acquire the eye image of theuser by directly photographing the eyes of the user by using the cameraincluded therein or by receiving an image of the eyes of the usercaptured by an external device from the external device.

FIG. 40 is a flowchart of a method of determining an inclination of thewearable glasses 1000 from an eye image of a user, according to anexemplary embodiment.

Referring to FIG. 40, in operation S1310, the wearable glasses 1000 mayextract a reflection image of a test image from the eye image.

For example, the wearable glasses 1000 may determine a first area 1301(see FIG. 42) corresponding to an eye of the user from the eye image anddetermine a second area 1401 (see FIG. 42) corresponding to an iris ofthe user and included in the first area 1301. The wearable glasses 1000may extract a reflection image 4205 (see FIG. 42) of the test image,based on at least one of brightness and color within the second area1301.

In operation S1320, the wearable glasses 1000 may determine theinclination of the wearable glasses 1000, based on at least one of thesize and the shape of the reflection image.

The wearable glasses 1000 may determine the inclination of the wearableglasses 1000 with respect to the user by comparing the at least one ofthe size and the shape of the extracted reflection image with at leastone of the size and the shape of the reference image.

FIG. 41 is a flowchart of a method in which the wearable glasses 1000display an image that has been adjusted based on the inclination of thewearable glasses 1000, according to an exemplary embodiment.

FIG. 12 illustrates the method in which the property value of the eyesis acquired by analyzing the eye image of the user and the inclinationof the wearable glasses 1000 is determined based on the property valueof the eyes. The method of FIG. 12 may be used to determine a top-bottominclination of the wearable glasses 1000. Furthermore, by performing themethod of FIG. 41, the wearable glasses 1000 may further consider thereflection image of the test image to thereby determine not only thetop-bottom inclination of the wearable glasses 1000, but also aleft-right inclination and a front-back inclination thereof with highaccuracy.

In operation S1305, the wearable glasses 1000 may determine thetop-bottom inclination thereof.

FIG. 42 is a schematic diagram for describing property values of theeyes of a user that are measured from a captured eye image of the user,according to an exemplary embodiment.

As shown in FIG. 42, the wearable glasses 1000 may determine, as a majoraxis, a line segment 1501 that connects points at which a straight linepassing through two focal points of the first area 1301, correspondingto the eye of the user, intersects with the first area 1301, anddetermine a length of the line segment 1501 as a length of the majoraxis.

The wearable glasses 1000 may determine as the minor axis a line segment1503 that perpendicularly bisects the line segment 1501, and determine alength of the line segment 1503 as a length of the minor axis.

The wearable glasses 1000 may extract the reflection image 4205 of thetest image from the second area 1401 corresponding to the iris of theuser.

The wearable glasses 1000 may acquire the angle of the major axis and/orthe angle of the minor axis, by comparing the angle of the major axisand/or the angle of the minor axis with a horizontal axis and/or avertical axis of the eye image. When the reflection image is a polygon,the wearable glasses 1000 may determine an angle between at least oneside of the reflection image 4205 and a horizontal axis 1509-3 or avertical axis 1509-1 of the wearable glasses 1000, as the inclination ofthe wearable glasses 1000.

The wearable glasses 1000 may determine the top-bottom inclinationthereof according to the method of FIG. 12. Thus, a redundantdescription of the determination of the top-bottom inclination isomitted below.

Referring back to FIG. 41, in operation S1310, the wearable glasses 1000may extract a reflection image of a test image from the eye image.

In operation S1330, the wearable glasses 1000 may determine theleft-right inclination and the front-back inclination of the wearableglasses 1000, based on at least one of the size and the shape of thereflection image extracted in operation S1310.

FIGS. 43A, 43B, and 43C are schematic diagrams for explaining a methodin which the wearable glasses 1000 determine an inclination of thewearable glasses 1000 based on a reflection image of a test image thatis included in an eye image of a user, according to one or moreexemplary embodiments.

Referring to FIG. 43A, the wearable glasses 1000 may determine an angle4301 between at least one side of the reflection image 4205 and themajor axis 1501 of an eye, as the top-bottom inclination of the wearableglasses 1000.

Referring to FIG. 43B, the wearable glasses 1000 may determine thefront-back inclination of the wearable glasses 1000, based on a ratiobetween the lengths of two sides, namely, an upper side 4303 and a lowerside 4305, included in the reflection image 4205. For example, when atest image has a rectangular shape and the reflection image 4205 has atrapezoidal shape, the front-back inclination of the wearable glasses1000 with respect to the user may be determined to increase with anincrease in the ratio between the lengths of the upper side 4303 and thelower side 4305.

Referring to FIG. 43C, the wearable glasses 1000 may determine theleft-right inclination of the wearable glasses 1000, based on a ratiobetween the lengths of two sides, namely, an upper side 4307 and a lowerside 4309, included in the reflection image 4205. For example, when thetest image has a rectangular shape and the reflection image 4205 has ashape of a 90°-rotated trapezoidal, the left-right inclination of thewearable glasses 1000 with respect to the user may be determined toincrease with an increase in the ratio between the lengths of the upperside 4307 and the lower side 4309.

Referring back to FIG. 41, in operation S1340, the wearable glasses 1000may adjust at least one of the rotation angle, the size, and the shapeof the display image, based on at least one of the front-backinclination, the left-right inclination, and the front-back inclinationof the wearable glasses 1000. However, it is understood that one or moreother exemplary embodiments are not limited thereto, and the wearableglasses 1000 may adjust various parameters of a display image that isshown to a user. For example, the wearable glasses 1000 may furtheradjust at least one of the brightness of the display image, a locationon which the display 1030 on which the display image is displayed, andthe color of the display image. As another example, when the display1030 of the wearable glasses 1000 is constructed as a semi-transparentoptical waveguide (for example, a prism), the wearable glasses 1000 mayadjust the location of a focal point on which light output from theprojector of the display 1030 is focused, based on the inclination ofthe wearable glasses 1000.

The wearable glasses 1000 may perform image adjustment based on at leastone of the front-back inclination, the left-right inclination, and thefront-back inclination of the wearable glasses 1000 (for example,horizontal translation, vertical translation, keystoning, and/or varioustypes of image processing in which a display image is corrected so thata user may be provided with a nondistorted image).

The wearable glasses 1000 may analyze the reflection image of the testimage and use the analyzed reflection image to control an operation ofthe wearable glasses 1000.

FIGS. 44A and 44B are schematic diagrams for explaining a method inwhich the wearable glasses 1000 operate based on an eye image, accordingto one or more exemplary embodiments.

As shown in FIG. 44A, the wearable glasses 1000 may determine a firstarea 1301 corresponding to an eye of a user and a second area 1401corresponding to an iris of the user, from the eye image. The wearableglasses 1000 may extract a reflection image 4401 of a test image fromthe eye image.

As shown in FIG. 44B, when the reflection image 4401 deviates from thesecond area 1401, the wearable glasses 1000 may perform a predeterminedoperation.

For example, while the user is viewing a moving picture via the wearableglasses 1000, the user may view a place other than the display 1030 ofthe wearable glasses 1000. When the user views a place other than thedisplay 1030 of the wearable glasses 1000, the test image may bereflected on a place other than the iris of the user. When a reflectionimage of the test image deviates from an area corresponding to an irisof the user, the wearable glasses 1000 may stop playing back the movingpicture.

The test image may be an image previously determined to be used tocontrol an operation of the wearable glasses 1000 as shown in FIGS. 36A,36B, and 36C, or a still image that is included in the moving pictureand obtained at a certain time point.

For example, while a moving picture is being played back, the wearableglasses 1000 may output a test image for a time so short that the usercannot recognize the test image, and acquire an image of the eyes of theuser on which the test image is reflected, thereby controlling anoperation of the wearable glasses 1000 based on a reflection image ofthe test image.

According to an exemplary embodiment, the wearable glasses 1000 mayadjust a display image, based on a gesture of a user. The term “gesture”may denote at least one of a shape of a body part of a user at a certaintime point, a variation in the shape of the body part of the user for acertain period of time, a variation in the location of the body part,and an action of the body part.

FIG. 45 is a schematic diagram for explaining a method in which thewearable glasses 1000 adjust a display image based on a gesture of auser, according to an exemplary embodiment.

As shown in FIG. 45, according to an exemplary embodiment, the wearableglasses 1000 may adjust a display image based on a gesture of a userwithin an interest space 4501.

For example, the wearable glasses 1000 may adjust the display imagebased on a gesture of hands 7 of the user.

To detect the gesture of the user, the wearable glasses 1000 may includea sensing unit (e.g., sensor) that includes a camera capable ofacquiring an image, or various sensors. Examples of the sensors that maybe included in the wearable glasses 1000 may include a depth sensor, aninfrared sensor, an ultrasonic sensor, and a sensor similar thereto. Forexample, the wearable glasses 1000 may detect the gesture of the user,based on an image of a body part of the user or a signal received fromthe body part of the user (for example, an infrared signal or anultrasonic signal). As another example, the wearable glasses 1000 maydetect the gesture of the user by receiving a signal associated with thegesture of the user from wearable devices 20 worn on the wrists of theuser or by detecting movements of the wearable devices 20.

FIG. 46 is a flowchart of a method in which the wearable glasses 1000adjust a display image based on a gesture of a user, according to anexemplary embodiment.

Referring to FIG. 46, in operation S2100, the wearable glasses 1000 mayacquire information about the gesture of the user.

The wearable glasses 1000 may acquire the information about the gestureof the user by using the sensing unit included in the wearable glasses1000 or acquire the information about the gesture of the user from anexternal device. For example, the wearable glasses 1000 may acquire theinformation about the gesture of the user by using at least one of amagnetic sensor, an acceleration sensor, a gyroscope sensor, a proximitysensor, an optical sensor, a depth sensor, an infrared sensor, anultrasonic sensor, or the like, which is included in the wearableglasses 1000. Alternatively, the wearable glasses 1000 may acquireinformation about a touch gesture of the user that is received via theuser input unit 1040 included in the wearable glasses 1000.

When the wearable glasses 1000 are initialized or the power of thewearable glasses 1000 is turned on, the wearable glasses 1000 mayacquire information about a gesture of the user that is used tocompensate for an inclination of the wearable glasses 1000.Alternatively, when the wearable glasses 1000 receive an input of a userwho wants to receive an image to which the inclination of has beencompensated for, the wearable glasses 1000 may acquire the informationabout the gesture of the user.

Alternatively, when the wearable glasses 1000 greatly move, the wearableglasses 1000 may determine that the location of the wearable glasses1000 with respect to the user is highly likely to be changed. Thus, whenat least one of movement state values of the wearable glasses 1000, forexample, an acceleration value, a velocity value, and an angularmomentum value, is measured and equal to or greater than a critical(e.g., predetermined) value, the wearable glasses 1000 may acquire theinformation about the gesture of the user.

For example, the information about the gesture of the user acquired bythe wearable glasses 1000 may be at least one of a degree of a change inthe location of a body part that takes a gesture, a degree of a changein the shape thereof, and a duration time of a movement of the user.

The information about the gesture of the user may be information that isused to determine an adjustment value for adjusting a display image. Forexample, the information about the gesture acquired by the wearableglasses 1000 may include information about at least one of the head, thehands, the eyes, and the mouth of the user. The information about thegesture acquired by the wearable glasses 1000 may also include an imageof the body part that takes the gesture. Alternatively, the informationabout the gesture of the user may include information about a touchinput of the user that is received via the user input unit 1040.

For example, the wearable glasses 1000 may acquire the information aboutthe gesture based on an image of the hands of the user. The wearableglasses 1000 may acquire the image of the hands and detect a change inat least one of palms, knuckles, and fingertips of the hands from theacquired hand image.

As another example, the wearable glasses 1000 may detect a gesture basedon a predetermined signal received from the hands. The wearable glasses1000 may transmit a predetermined signal to the hands and acquire theinformation about the gesture based on a signal reflected from the handsin response to the transmitted signal. For example, the predeterminedsignal may be an infrared signal or an ultrasonic signal. The wearableglasses 1000 may detect a change in at least one of palms, knuckles, andfingertips of the hands from a predetermined signal received from atarget object.

As another example, the information about the gesture of the user mayinclude information about a user input that is received via the userinput unit 1040. For example, the user input may include an input oftouching a touch pad, an input of rotating a wheel, or an input ofpushing a button. The wearable glasses 1000 may acquire informationabout a touch input of the user that is received via the user input unit1040 included in the wearable glasses 1000, as the information about thegesture of the user. For example, the wearable glasses 1000 may includea touch pad as the user input unit 120.

A method of acquiring the information about the gesture of the user willbe described in more detail later with reference to FIGS. 47 through 49.

In operation S2200, the wearable glasses 1000 may determine anadjustment value based on the acquired information.

The adjustment value is used to adjust a display image. The adjustmentvalue may be a value for adjusting at least one of the rotation angle,the size, and the shape of the display image. Alternatively, theadjustment value may be a value for adjusting the brightness of thedisplay image, a location on the display 1030 where the display image isdisplayed, or a color of the display image. Alternatively, when thedisplay 1030 of the wearable glasses 1000 is constructed as asemi-transparent optical waveguide (for example, a prism), theadjustment value may be the location of a focal point on which lightoutput from the projector of the display 1030 of the wearable glasses1000 is focused.

The wearable glasses 1000 may map information about several gestureswith adjustment values and store a result of the mapping, or storerelations capable of calculating the adjustment values based on theinformation about the gestures. The wearable glasses 1000 may determinethe adjustment value by searching for a pre-stored adjustment valuebased on the acquired information, or by calculating the adjustmentvalue by using a found relation.

In operation S2300, the wearable glasses 1000 may adjust an image thatis displayed on the display 1030, based on the determined adjustmentvalue.

First, the wearable glasses 1000 may adjust at least one of a rotationangle, a size, and a shape of the image being displayed on the display1030, based on the determined adjustment value. Alternatively, thewearable glasses 1000 may adjust at least one of a brightness of theimage being displayed on the display 1030, a location on the display1030 on which the image is displayed, and a color of the image beingdisplayed on the display 1030, based on the determined adjustment value.

Alternatively, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the wearable glasses 1000 may adjust the location of a focalpoint on which light output from the projector of the display 1030 isfocused, based on the inclination of the wearable glasses 1000.

The wearable glasses 1000 may perform image adjustment based on theadjustment value (for example, horizontal translation, verticaltranslation, keystoning, and/or various types of image processing inwhich a display image is corrected so that a user may be provided with anondistorted image).

For example, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the wearable glasses 1000 may adjust the location of a focalpoint on which light output from the projector of the display 1030 isfocused, based on the inclination of the wearable glasses 1000.

Next, the wearable glasses 1000 may display an adjusted image. Thedescription of operation S400 of FIG. 6 may be applied to operationS2300 of FIG. 46, and thus a repeated description of operation S2300 ofFIG. 46 will be omitted.

When the gesture of the user is used to adjust an image that isdisplayed via the wearable glasses 1000, an operation of acquiringinformation about the gesture of the user may be continuously performedat regular time intervals. For example, to acquire the information aboutthe gesture of the user, the wearable glasses 1000 may photograph a bodypart that takes the gesture, at predetermined time intervals, andanalyze captured images.

However, continuously acquiring the information about the gesture of theuser may cause overload of a memory capacity and overload of the numberof calculations performed by a processor. Accordingly, according to anexemplary embodiment, the wearable glasses 1000 may be constructed toacquire the information about the gesture of the user only when apredetermined event has occurred.

FIG. 47 is a flowchart of a method in which the wearable glasses 1000acquire information about a gesture of a user, according to an exemplaryembodiment.

The information about the gesture of the user may be information that isused to determine an adjustment value for adjusting a display image. Forexample, the information about the gesture may include an image of abody part that takes the gesture.

In operation S2110, the wearable glasses 1000 may determine whether thewearable glasses 1000 are initialized. For example, when the power ofthe wearable glasses 1000 is turned on or an initialization input forinitializing the wearable glasses 1000 is received from the user, thewearable glasses 1000 may be initialized.

When the wearable glasses 1000 are initialized, the wearable glasses1000 may acquire the information about the gesture of the user, inoperation S2150. When the wearable glasses 1000 are not initialized(e.g., when the wearable glasses 1000 are continuously working), thewearable glasses 1000 may acquire the information about the gesture ofthe user based on a movement state value of the wearable glasses 1000 byperforming operation S2120.

In operation S2120, the wearable glasses 1000 may measure the movementstate value of the wearable glasses 1000. The movement state valuedenotes a value representing a movement of the wearable glasses 1000.

For example, the wearable glasses 1000 may measure at least one of anacceleration value, a velocity value, and an angular momentum value ofthe wearable glasses 1000, as the movement state value. In operationS2130, the wearable glasses 1000 may determine whether the measuredmovement state value is equal to or greater than a predetermined value.When the measured movement state value is equal to or greater than thepredetermined value, the wearable glasses 1000 may acquire theinformation about the gesture of the user, in operation S2150. When themeasured movement state value of the wearable glasses 1000 is less thanthe predetermined value, the wearable glasses 1000 may acquire theinformation about the gesture of the user based on a user input byperforming operation S2140.

However, it is understood that one or more other exemplary embodimentsare not limited to operation S2130 of FIG. 47. The wearable glasses 1000may determine not only whether the movement state value is equal to orgreater than the predetermined value, but also whether the movementstate value is less than or equal to the predetermined value or whetherthe movement state value is less than the predetermined value. In otherwords, the wearable glasses 1000 may compare the movement state valuewith the predetermined value and determine whether to acquire theinformation about the gesture of the user based on a result of thecomparison.

In operation S2140, the wearable glasses 1000 determine whether an inputfor adjusting a display image has been received from the user. When adistorted image is provided due to a change in the location of thewearable glasses 1000, the user may input to the wearable glasses 1000 acommand for adjusting the display image based on the gesture of theuser.

The wearable glasses 1000 determine whether the user input for adjustingthe display image has been received, in operation S2140. When the userinput for adjusting the display image has been received, the wearableglasses 1000 may acquire the information about the gesture of the user,in operation S2150. When the user input for adjusting the display imageis not received, the wearable glasses 1000 may repeat operations S2110to S2140.

In operation S2150, the wearable glasses 1000 may acquire theinformation about the gesture of the user. For example, when theinformation about the gesture of the user is an image of the gesture,the wearable glasses 1000 may output a guide image for inducing thegesture of the user.

The wearable glasses 1000 guide the user to take a gesture for adjustinga display image by outputting the guide image, thereby determining theadjustment value for adjusting the display image based on the gesture ofthe user.

FIGS. 48 and 49 illustrate examples of a screen of the wearable glasses1000 on which a guide image for inducing a gesture of a user isdisplayed, according to one or more exemplary embodiments.

As shown in FIGS. 48 and 49, a guide image 4800 displayed via thewearable glasses 1000 may include a virtual input interface 4801 forinducing the gesture of the user.

The virtual input interface 4801 may be of a button type or a typerepresenting a physical switch (for example, a toggle switch, a rotaryswitch, or a tumbler switch), and various modifications may beimplemented as to the type of virtual input interface 4801.

The user may take (e.g., make) gestures according to the types ofvirtual input interface 4801 that is provided via the display 1030 ofthe wearable glasses 1000.

For example, when the user is provided with the guide image 4800 of FIG.48, the user may take a gesture of rotating the virtual input interface4801 with the hands of the user. When the user is provided with theguide image 4800 of FIG. 49, the user may take a gesture of pressing atleast one arrow-shaped button included in the virtual input interface4801 with the hands of the user.

In operation S1150, the wearable glasses 1000 photograph the gesture ofthe user. FIGS. 52 through 54 illustrate examples of an image of agesture of a user that is acquired via the wearable glasses 1000,according to one or more exemplary embodiments.

The wearable glasses 1000 may determine an adjustment value foradjusting a display image, based on information about a gesture of auser. For example, the wearable glasses 1000 may acquire an image of thegesture of the user and analyze the image of the gesture to therebydetermine the adjustment value.

A case of determining an adjustment value by analyzing an image of agesture of the hands of a user will now be illustrated. However, it isunderstood that one or more other exemplary embodiments are not limitedthereto, and the wearable glasses 1000 may adjust a display image byusing a gesture of a body part of a user other than the hands of theuser.

FIG. 50 is a flowchart of a method in which the wearable glasses 1000determine an adjustment value from a gesture image of a user, accordingto an exemplary embodiment.

Referring to FIG. 50, in operation S2210, the wearable glasses 1000 maydetermine an area corresponding to the hands of the user from thegesture image.

FIG. 51 is a schematic diagram for explaining a method in which thewearable glasses 1000 detect a hand gesture of a user, according to anexemplary embodiment.

As shown in FIG. 51, the wearable glasses 1000 may acquire an image S100of the hands of a user that are located within an interest spaceexisting with a predetermined distance from the wearable glasses 1000,and detect a gesture of the hands from the acquired image S100.

For example, the wearable glasses 1000 may estimate areas S102corresponding to the hands of the user from the image S100.

In operation S2220, the wearable glasses 1000 may detect the number ofhands and the number of fingers.

Referring to FIG. 51, the wearable glasses 1000 may analyze the areasS102 corresponding to the hands of the user to thereby further detectareas S104 corresponding to fingertips and areas S106 corresponding tothe backs of the hands, which are included in the areas S102corresponding to the hands. However, it is understood that one or moreother exemplary embodiments are not limited to the backs of the hands,and the wearable glasses 1000 may detect an area corresponding to atleast a portion of a hand (for example, a palm or a wrist).

The wearable glasses 1000 may detect the number of hands that existwithin the interest space and the number of fingers that exist withinthe interest space, based on a detected area.

In operation S2230, the wearable glasses 1000 may select a parameter ofan image that is to be adjusted, based on the number of hands and thenumber of fingers. The wearable glasses 1000 may determine the type ofgesture of the hands of the user, based on the number of hands and thenumber of fingers.

The wearable glasses 1000 may determine the parameter of the image to beadjusted, based on the determined type of the gesture. The parameter ofthe image to be adjusted may include at least one of the size, theshape, and the rotation angle of the image to be adjusted. In otherwords, the wearable glasses 1000 may determine which parameter fromamong the size, location, shape, and rotation angle of a display imageis to be adjusted, based on the determined type of the gesture. However,the parameter of the image to be adjusted is not limited thereto in oneor more other exemplary embodiments.

For example, the parameter of the image to be adjusted may be aparameter associated with a location on the display 1030 where the imageto be adjusted is displayed, or a color of the image to be adjusted.Alternatively, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the parameter of the image to be adjusted may be the location ofa focal point on which light output from the projector of the display1030 of the wearable glasses 1000 is focused.

In operation S2240, the wearable glasses 1000 may detect variations inthe location and shape of the hands.

For example, the wearable glasses 1000 may detect movements (forexample, distances or angles of movements) of the areas S104corresponding to the fingertips with respect to the areas S106corresponding to the backs of the hands.

For example, the wearable glasses 1000 may detect an operation of a userbending a finger, by detecting that the areas S104 corresponding to thefingertips and the areas S106 corresponding to the backs of the handsbecome closer to each other. Alternatively, the wearable glasses 1000may detect an operation of a user unbending a finger, by detecting thatthe areas S104 corresponding to the fingertips and the areas S106corresponding to the backs of the hands become farther to each other.

In operation S2250, the wearable glasses 1000 may determine anadjustment value for adjusting the selected parameter, based on thevariations in the location and shape of the hands.

For example, the wearable glasses 1000 may determine how much theselected parameter is to be adjusted based on a variation in a distanceby which at least a portion of a hand is moved for a predeterminedperiod of time or a variation in the shape in which at least a portionof the hand is moved for the predetermined period of time. However, itis understood that one or more other exemplary embodiments are notlimited thereto. For example, the wearable glasses 1000 may determinethe adjustment value, based on various pieces of information acquiredbased on a gesture, such as, a speed at which the hand moves, a locationfrom which the hand is detected, a direction in which the hand moves,and the number of times an action of taking the gesture is repeated.

FIGS. 52, 53, and 54 are schematic diagrams for explaining a method inwhich the wearable glasses 1000 determine an adjustment value foradjusting a display image based on a gesture of a user, according to anexemplary embodiment.

Referring to FIG. 52, the wearable glasses 1000 may output a guide imagethat guides the user to take a gesture of rotating the virtual inputinterface 4801 with a hand 7.

When the gesture of the hand 7 of the user corresponding to the virtualinput interface 4801 is detected, the wearable glasses 1000 may adjust adisplay image based on an angle at which the hand 7 of the user ismoved, a distance by which the hand 7 of the user is moved, or a speedat which the hand 7 of the user is moved.

For example, when the user takes a gesture of clockwise rotating thevirtual input interface 4801 with the hand 7, the wearable glasses 1000may clockwise rotate the display image by an angle at which the hand 7of the user is rotated.

As shown in FIG. 53, the wearable glasses 1000 may output a guide imagethat guides the user to take a gesture of pressing at least one buttonincluded in the virtual input interface 4801 with the hand 7.

When the gesture of the hand 7 of the user corresponding to the virtualinput interface 4801 is detected, the wearable glasses 1000 may adjust adisplay image based on the location of the hand 7 of the user and adistance by which or the number of times the hand 7 of the user ismoved.

For example, when the user takes a gesture of pressing an arrow-shapedbutton included in the virtual input interface 4801 with the hand 7, thewearable glasses 1000 may move the display image in a directioncorresponding to the arrow-shaped button. In this case, the wearableglasses 1000 may move the display image by a distance corresponding tothe number of times the hand 7 of the user is moved.

As shown in FIG. 54, the wearable glasses 1000 may output a guide imagethat guides the user to take a gesture of moving the virtual inputinterface 4801 with the hand 7.

When a gesture of the hand 7 of the user corresponding to the virtualinput interface 4801 is detected, the wearable glasses 1000 may adjust adisplay image based on a distance by which the hand 7 of the user ismoved or an angle at which the hand 7 of the user is rotated.

For example, when the user takes a gesture of rotating the virtual inputinterface 4801 with the hand 7, the wearable glasses 1000 may rotate thedisplay image by an angle at which the hand 7 of the user rotates.

A method of adjusting the display image based on a gesture of a userwithin an interest space, according to one or more exemplaryembodiments, has been described above with reference to FIGS. 50 through54. However, it is understood that one or more other exemplaryembodiments are not limited thereto.

For example, according to one or more other exemplary embodiments, thewearable glasses 1000 may acquire information about a touch input of theuser that is received via the user input unit 1040 included in thewearable glasses 1000, as the information about the gesture of the user.For example, the wearable glasses 1000 may include a touch pad as theuser input unit 120. The touch pad included in the wearable glasses 1000may be a capacitive overlay type, a resistive overlay type, an infraredbeam type, a surface acoustic wave type, an integral strain gauge type,a piezo electric type, an optical input device or pad, or the like, butis not limited thereto.

The touch pad included in the wearable glasses 1000 may be configured todetect a proximity touch as well as a real touch. Throughout thespecification, the term “real touch” denotes a case in which a pointerreally or directly touches a screen, and the term “proximity touch”denotes a case in which the pointer does not actually touch the screenbut approaches a position which is separated from the screen by acertain distance.

The pointer used herein denotes a touch instrument for really touchingor proximity-touching a portion of a displayed screen image. Examples ofthe pointer include an electronic pen, a finger, a stylus pen, etc.

In order to detect a real touch or a proximity touch, various sensorsmay be provided within or near the touch pad. An example of the sensorused to detect the actual touch or the proximate touch on the touch padmay include a tactile sensor. The tactile sensor denotes a sensor thatdetects a touch by a specific object to a degree to which a human feelsor more. The tactile sensor may detect various types of information,such as the roughness of a touched surface, the hardness of the touchingobject, the temperature of a touched point, and the like.

Another example of the sensor used to detect a touch on the touch pad isa proximity sensor. The proximity sensor is a sensor that detects theexistence of an object that approaches a predetermined detection surfaceor that exists nearby, by using an electromagnetic force or infraredrays, without using any mechanical contact. Examples of the proximitysensor include a transmission-type photoelectric sensor, a directreflection-type photoelectric sensor, a mirror reflection-typephotoelectric sensor, a high frequency oscillation-type proximitysensor, a capacity-type proximity sensor, a magnetic proximity sensor,an infrared-type proximity sensor, or the like.

Examples of the touch gesture of the user may include tap, touch andhold, double tap, drag, panning, flick, drag and drop, swipe, and thelike.

The wearable glasses 1000 may acquire the information about the gestureof the user via the user input unit 1040. For example, the wearableglasses 1000 may sense a touch input for adjusting a display image viathe user input unit 1040. For example, the user may drag or tap apredetermined location on the touch pad of the user input unit 1040.

“Drag” denotes an action of a user touching a screen with a fingertip ora touch tool and moving the fingertip or touch tool to other positionson the screen while touching the screen. “Tap” denotes an action of auser touching a screen with a fingertip or a touch tool (e.g., anelectronic pen) and very quickly lifting the fingertip or the touch toolfrom the screen without moving.

The wearable glasses 1000 may adjust the display image based on a touchinput of the user. For example, the wearable glasses 1000 may acquire atouch input of the user as the information about the gesture of theuser, determine an adjustment value based on the touch input of theuser, and adjust the display image based on the determined adjustmentvalue.

FIGS. 55 and 56 are schematic diagrams for explaining a method in whichthe wearable glasses 1000 adjust a display image based on a gesture of auser, according to one or more exemplary embodiments.

FIGS. 55 and 56 illustrate a case in which the wearable glasses 1000include a touch pad as the user input unit 1040, according to one ormore exemplary embodiments. The touch pad included in the wearableglasses 1000 may be a capacitive overlay type, a resistive overlay type,an infrared beam type, a surface acoustic wave type, an integral straingauge type, a piezo electric type, or the like, but is not limitedthereto.

First, as shown in FIG. 55, the wearable glasses 1000 may detect agesture of a user dragging a predetermined location on the touch pad ofthe user input unit 1040. The wearable glasses 1000 may adjust thedisplay image based on at least one of a direction of the drag gestureof the user, a duration thereof, and a distance by which the hand 7 ismoved due to the drag gesture.

For example, as shown in FIG. 55, the wearable glasses 1000 may changethe location of a display image S501, based on a drag input of the user.

The wearable glasses 1000 may identify a multi-touch gesture byrecognizing several touch points via the user input unit 1040. Thewearable glasses 1000 may be set to differently react according to thenumber of touch points that are sensed, by identifying the multi-touchgesture.

As shown in FIG. 56, the wearable glasses 1000 may detect a gesture of auser touching a predetermined location on the touch pad of the userinput unit 1040 by using a plurality of fingers. The wearable glasses1000 may adjust the display image based on at least one of the number oftouch points of the user, a direction in which the fingers move, aduration of the touch gesture, and a distance by which the fingers aremoved due to the touch gesture.

For example, as shown in FIG. 56, in response to a user input ofdragging the user input unit 1040 by using at least two fingers, thewearable glasses 1000 may rotate a display image S601, based on adirection in which the touch input is moved.

However, it is understood that one or more other exemplary embodimentsare not limited to FIGS. 55 and 56. The wearable glasses 1000 may adjustat least one of a rotation angle, a size, a location, a brightness, anda shape of the display image according to various touch inputs of theuser. For example, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the wearable glasses 1000 may adjust the location of a focalpoint on which light output from the projector of the display 1030 isfocused, based on the touch input of the user.

The wearable glasses 1000 may operate in connection with a device suchas a mobile phone, a personal digital assistant (PDA), a laptop, atablet, a portable multimedia player, a display device, a personalcomputer (PC), a server, etc. The device may display an image via thewearable glasses 1000.

FIG. 57 is a schematic diagram of a system in which a device 2000displays an image via the wearable glasses 1000, according to anexemplary embodiment.

Referring to FIG. 57, the wearable glasses 1000 may provide the device2000 with information that is used to adjust a display image.

The information provided by the wearable glasses 1000 to the device 2000may include, for example, at least one of information about a body partof a user who is wearing the wearable glasses 1000, information about agesture of the user, and a user input that is input via the wearableglasses 1000.

The device 2000 adjusts the display image based on the informationreceived from the wearable glasses 1000, and provides an adjusted imageto the wearable glasses 1000. The display 2000 may display the adjustedimage via the wearable glasses 1000.

The wearable glasses 1000 may photograph a body part of the user andtransmit an image of the body part to the device 2000. For example, thewearable glasses 1000 may photograph the eyes or hands of the user.

The device 2000 may receive the image captured by the wearable glasses1000 from the wearable glasses 1000, and determine a display image viathe wearable glasses 1000. The display 2000 may determine a location onwhich an image is to be displayed, and may display the image on thedetermined location via the wearable glasses 1000.

Examples of the device 2000 may include, but are not limited to, asmartphone, a tablet personal computer (PC), a PC, a smart TV, a mobilephone, a PDA, a laptop, a media player, a micro-server, a globalpositioning system (GPS) device, an electronic book terminal, a digitalbroadcasting terminal, a navigation device, a kiosk, an MP3 player, adigital camera, and other mobile or non-mobile computing devices. Thedevice 2000 may also include various apparatuses capable of receiving atouch input, such as, an electronic blackboard and a touch table. Thedevice 2000 may be a wearable device including a communication functionand a data processing function. However, it is understood that one ormore other exemplary embodiments are not limited thereto, and the device1000 may be any kind of apparatus capable of receiving or transmittingdata from or to the wearable glasses 1000 via a network.

The device 2000 and the wearable glasses 1000 may be connected to eachother via a network, and the network may be a wired network, such as alocal area network (LAN), a wide area network (WAN), or a value addednetwork (VAN), or any kind of wireless network, such as a mobile radiocommunication network, a satellite communication network, etc.

FIG. 58 is a flowchart of a method in which the device 2000 displays animage via the wearable glasses 1000, according to an exemplaryembodiment.

Referring to FIG. 58, in operation S3100, the device 2000 may receivewear state information representing a state where a user currently wearsthe wearable glasses 1000, from the wearable glasses 1000. The wearstate information may include information about a body part of the user.The information about the body part of the user may be information thatis used to determine an inclination of the wearable glasses 1000 withrespect to the user as compared with the reference wear state. Forexample, the information about the body part acquired by the wearableglasses 1000 may include information about at least one selected fromthe eyes, nose, ears, mouth, and hands of the user. The informationabout the body part acquired by the wearable glasses 1000 may alsoinclude an image of the body part.

The wear state information received by the device 2000 from the wearableglasses 1000 in operation S3100 may be information acquired by thewearable glasses 1000.

Operation S200 of FIG. 58 corresponds to operation S200 of FIG. 6, andthus a redundant description thereof is omitted below.

In operation S3200, the wearable glasses 1000 may determine aninclination of the wearable glasses 1000 with respect to the user, byusing the received information about the body part of the user.

The inclination of the wearable glasses 1000 with respect to the userdenotes an inclination degree of the wearable glasses 1000 that isdetermined based on a location of the wearable glasses 1000 that is themost appropriate to show an image to the user.

For example, the device 2000 may determine the inclination of thewearable glasses 1000 with respect to the user by comparingpredetermined reference wear state information with the wear stateinformation received from the wearable glasses 1000. The reference wearstate information is information representing the location of thewearable glasses 1000 that is the most appropriate to provide an imageto a user. The reference wear state information may be pre-stored or maybe set by the user.

For example, the wear state information may include an image of the bodypart of the user. The device 2000 may detect an area corresponding tothe body part from the image of the body part and acquire a propertyvalue of the body part from the detected area. The device 2000 mayacquire a property value associated with the location, the shape, or thesize of the area corresponding to the body part detected from the imageof the body part. The device 2000 may determine the inclination bycomparing the acquired property value with a reference value included inthe reference wear state information. The reference value included inthe reference wear state information may be a property value detectedfrom an image of a body part acquired in the reference wear state.

In operation S3300, the device 2000 may adjust an image that isdisplayed on the display 1030 of the wearable glasses 1000, based on theinclination determined in operation S3200. For example, the device 2000may adjust at least one of a rotation angle, a size, and a shape of adisplay image, based on the inclination determined in operation S3200.

However, it is understood that one or more other exemplary embodimentsare not limited thereto, and the device 2000 may adjust variousparameters of an image that is provided to the user via the display1030. For example, the device 2000 may further adjust at least one ofthe brightness of the image that is displayed on the display 1030, alocation on the display 1030 on which the image is displayed, and thecolor of the image that is displayed on the display 1030.

As another example, when the display 1030 of the wearable glasses 1000is constructed as a semi-transparent optical waveguide (for example, aprism), the device 2000 may adjust the location of a focal point onwhich light output from the projector of the display 1030 is focused,based on the inclination of the wearable glasses 1000.

In operation S3400, the device 2000 may provide an adjusted imageobtained in operation S3300 to the wearable glasses 1000. In operationS400, the adjusted image provided by the device 2000 to the wearableglasses 1000 may be displayed via the wearable glasses 1000.

When the device 2000 adjusts the display image by using the informationabout the body part, any of the methods described above may be applied.In other words, any method described above, in which the wearableglasses 1000 adjusts a display image, may be applied to the case wherethe device 2000 adjusts an image that is displayed on the wearableglasses 1000 according to one or more exemplary embodiment. Thus, aredundant description of the case where the device 2000 adjusts an imagethat is displayed on the wearable glasses 1000 is omitted below.

FIG. 59 is a flowchart of a method in which the device 2000 displays animage via the wearable glasses 1000, according to an exemplaryembodiment.

Referring to FIG. 59, in operation S4100, the device 2000 may receiveinformation about a gesture of a user from the wearable glasses 1000.

The information about the gesture of the user may be information that isused to determine an adjustment value for adjusting a display image. Forexample, the information about the gesture acquired by the wearableglasses 1000 may include information about at least one of the head, thehands, the eyes, and the mouth of the user. The information about thegesture acquired by the wearable glasses 1000 may also include an imageof the body part that takes the gesture.

The information about the gesture received by the device 2000 from thewearable glasses 1000 in operation S4100 may be information acquired bythe wearable glasses 1000. Operation S2100 of FIG. 59 corresponds tooperation S2100 of FIG. 46, and thus a redundant description thereof isomitted below.

In operation S4200, the device 2000 may determine an adjustment valuefor adjusting a display image, based on the received information aboutthe gesture of the user.

For example, the adjustment value may be a value for adjusting at leastone of the rotation angle, the size, and the shape of the display image.Alternatively, the adjustment value may be a value for adjusting thebrightness of the display image, a location on the display 1030 wherethe display image is displayed, or a color of the display image.Alternatively, when the display 1030 of the wearable glasses 1000 isconstructed as a semi-transparent optical waveguide (for example, aprism), the adjustment value may be the location of a focal point onwhich light output from the projector of the display 1030 of thewearable glasses 1000 is focused.

The device 2000 may map information about several gestures withadjustment values and store a result of the mapping, or store relationscapable of calculating the adjustment values based on the informationabout the gestures. The device 2000 may determine the adjustment valueby searching for a pre-stored adjustment value based on the acquiredinformation, or by calculating the adjustment value by using a foundrelation.

In operation S4300, the device 2000 may adjust a display image, based onthe determined adjustment value. For example, the wearable glasses 1000may adjust at least one of a rotation angle, a size, and a shape of thedisplay image, based on the determined adjustment value.

In operation S4400, the device 2000 may provide an adjusted imageobtained in operation S4300 to the wearable glasses 1000. In operationS400, the adjusted image provided by the device 2000 to the wearableglasses 1000 may be displayed via the wearable glasses 1000.

When the device 2000 adjusts a display image by using information abouta gesture of a user, the method described above with reference to FIGS.45 through 56 may be applied. In other words, the method described abovewith reference to FIGS. 45 through 56, in which the wearable glasses1000 adjusts a display image, may be applied to the case where thedevice 2000 adjusts an image that is displayed on the wearable glasses1000 according to an exemplary embodiment. Thus, a redundant descriptionof the case where the device 2000 adjusts an image that is displayed onthe wearable glasses 1000 is omitted below.

FIG. 60 is a block diagram of the wearable glasses 1000, according to anexemplary embodiment.

Referring to FIG. 60, the wearable glasses 1000 may include a sensingunit 1100 (e.g., sensor), a processor 1200, and a display 1030. Otherand/or additional components than those illustrated in FIG. 60 may beincluded in the wearable glasses 1000. The components included in thewearable glasses 1000 may be arranged on a frame that is used to wearthe wearable glasses 1000 on the head of a user.

The display 1030 shows an image to the user. The display 1030 displaysinformation that is processed by the wearable glasses 1000. The display1030 may display an image that has been adjusted based on an inclinationof the wearable glasses 1000 or a gesture of the user.

The display 1030 may display at least one of a user interface (UI) forsetting a reference value that is used to adjust a display image, a UIfor inducing a gesture of the user that is used to adjust the displayimage, and a UI for providing the user with information associated withadjustment of the display image.

The sensing unit 1100 may acquire information about a body part of theuser or information about a gesture of the user. The information aboutthe body part of the user may include an image of the body part, and theinformation about the gesture of the user may include an image of a bodypart of the user that takes the gesture.

For example, the sensing unit 1100 may acquire an image of the eyes ofthe user or an image of the hands of the user.

The processor 1200 may determine an inclination of the wearable glasses1000 with respect to the user by using the information about the bodypart of the user, and adjust a display image based on the determinedinclination. Alternatively, the processor 1200 may determine anadjustment value by using the information about the gesture of the user,and adjust a display image based on the adjustment value.

As shown in FIG. 61, the wearable glasses 1000 may further include acommunication unit 1300 (e.g., communicator), a memory 1400, a userinput unit 1040 (e.g., user inputter or user input device), an outputunit 1500 (e.g., outputter or output device), and a power supply unit1600 (e.g., power supplier or power supply). According to an exemplaryembodiment, the sensing unit 1100 may include at least one camera,namely, cameras 1050, 1060, and 1070, and a sensor 1150. Theabove-described components may be connected to one another via a bus.

The aforementioned components will now be described in detail.

The cameras 1050, 1060, and 1070 photograph or capture an image of anobject in an actual space. Object images captured by the cameras 1050,1060, and 1070 may be moving picture images or consecutive still images.The wearable glasses 1000 may be an eyeglasses-type device including acommunication operation and a data processing operation. The camera 1050in the wearable glasses 1000 may face the user and photograph the objectof the actual space.

The camera 1060 may photograph the eyes of the user. For example, thecamera 1060 in the wearable glasses 1000 may face the face of the userand photograph the eyes of the user.

The eye tracking camera 1070 may photograph the eyes of the user. Forexample, the eye tracking camera 1070 in the wearable glasses 1000 maytrack the eyes of the user by tracking at least one of a head pose,eyelids, and irises of the user.

The sensor 1150 may sense a status of the wearable glasses 1000 or astatus of the surrounding of the wearable glasses 1000 and may transmitinformation corresponding to the sensed status to the processor 1200.For example, the sensor 1150 may acquire wear state informationrepresenting a state in which the user currently wears the wearableglasses 1000. For example, the sensor 1150 may include at least one of amagnetic sensor, an acceleration sensor, a gyroscope sensor, a proximitysensor, an optical sensor, a depth sensor, an infrared sensor, and anultrasonic sensor.

The communication unit 1300 may transmit or receive information that isused when the wearable glasses 1000 display an image and adjust adisplay image, to or from the device 2000, peripheral devices, or aserver.

The memory 1400 stores the information that is used when the wearableglasses 1000 display an image and adjust the image based on aninclination of the wearable glasses 1000. The memory 1400 may storeinformation about a reference wear state representing a state in whichthe wearable glasses 1000 are worn by the user on a location that is themost appropriate for the user to receive an image. For example, thememory 1400 may store reference wear state information including animage of a body part of the user that is acquired in a reference wearstate, and a property value that is detected from the image of the bodypart of the user acquired in the reference wear state.

The user input unit 1040 receives a user unit for controlling thewearable glasses 1000. The user input unit 1040 may receive a touchinput with respect to the wearable glasses 1000 and a key input withrespect to the wearable glasses 1000. The user input unit 1040 may alsoreceive a gesture input of the user that is photographed by the camera1050.

The power supply unit 1600 supplies power for operating the wearableglasses 1000, to each component. The power supply unit 1600 may includea battery capable of charging, and a cable or cable port capable ofreceiving power from an external source.

The output unit 1500 outputs information received from the communicationunit 1300, processed by the processor 1200, or stored in the memory1400, in the form of at least one of light, sound, and vibration. Forexample, the output unit 1500 may include a speaker 1020 outputtingaudio data. The speaker 1020 may also output an audio signal (forexample, a call signal receiving sound, a message receiving sound, anotification sound) related with a function of the wearable glasses1000.

The processor 1200 may control overall operations of the wearableglasses 1000. For example, the processor 1200 may control the display1030, the sensing unit 1100, the communication unit 1300, the memory1400, the user input unit 1040, the output unit 1100, and the powersupply unit 1600 by executing programs stored in the memory 1400.

The wearable glasses 1000 may be connected to the device 2000 and mayreceive information about a display image from the device 2000 tothereby display an image on the display 1030 of the wearable glasses1000.

FIGS. 62 and 63 are block diagrams of devices 2000 according to one ormore exemplary embodiments.

Referring to FIG. 62, the device 2000 may include a user input unit6100, an output unit 6200, a controller 6300, and a communication unit6500. More or less components than those illustrated in FIG. 62 may beincluded the device 2000.

For example, referring to FIG. 63, the device 2000 may further include asensing unit 6400 (e.g., sensor), an audio/video (A/V) input unit 6600(e.g., A/V inputter or A/V input device), and a memory 6700, in additionto the user input unit 6100 (e.g., user inputter or user input device),the output unit 6200 (e.g., outputter or output device), the controller6300, and the communication unit 6500 (e.g., communicator).

The user input unit 6100 denotes a unit via which a user inputs data forcontrolling the device 2000. For example, the user input unit 6100 maybe, but not limited to, a key pad, a dome switch, a touch pad (e.g., acapacitive overlay type, a resistive overlay type, an infrared beamtype, an integral strain gauge type, a surface acoustic wave type, apiezo electric type, or the like), a jog wheel, or a jog switch.

The user input unit 6100 may receive a user unit for controlling thewearable glasses 1000. The user input unit 6100 may also receive a userunit for adjusting an image that is displayed via the wearable glasses1000, based on information about a body part of a user or informationabout a gesture of the user.

The output unit 6200 may output an audio signal, a video signal, or avibration signal, and may include a display 6210, an audio output unit6220 (e.g., speaker, audio outputter, audio jack, audio output device),and a vibration motor 6230.

The display 6210 displays information that is processed by the device2000. For example, the display 6210 may display a UI for receiving auser input for controlling the wearable glasses 1000, and a UI forreceiving a setting value associated with an operation of adjusting animage that is displayed via the wearable glasses 1000.

When the display 6210 forms a layer structure together with a touch padto construct a touch screen, the display 6210 may be used as an inputdevice as well as an output device. The display 6210 may include atleast one of a liquid crystal display (LCD), a thin filmtransistor-liquid crystal display (TFT-LCD), an organic light-emittingdiode (OLED), a flexible display, a 3D display, and an electrophoreticdisplay. According to one or more exemplary embodiments of the device2000, the device 2000 may include at least two displays 6210. The atleast two displays 6210 may be disposed to face each other by using ahinge.

The audio output unit 6220 may output audio data that is received fromthe communication unit 6500 or stored in the memory 6700. The audiooutput unit 6220 may also output an audio signal (for example, a callsignal receiving sound, a message receiving sound, a notification sound)related with a function of the device 2000. The audio output unit 6220may include a speaker, a buzzer, and the like.

The vibration motor 6230 may output a vibration signal. For example, thevibration motor 6230 may output a vibration signal corresponding to anoutput of audio data or video data (for example, a call signal receivingsound or a message receiving sound). The vibration motor 6230 may alsooutput a vibration signal when the touch screen is touched.

The controller 6300 may control all operations of the device 2000. Forexample, the controller 6300 may control the user input unit 6700, theoutput unit 6200, the sensing unit 6400, the communication unit 6500,the A/V input unit 6600, and the like by executing programs stored inthe memory 6500.

In detail, the controller 6300 receives information for use in adjustinga display image from the wearable glasses 1000 and adjust the displayimage based on the received information, by controlling thecommunication unit 6500.

The controller 6300 receives a user input for controlling an operationof the wearable glasses 1000. The user input may be, for example, atouch input, a button input, or a voice input, but is not limitedthereto. The controller 6300 may receive a user input with respect tothe wearable glasses 1000, from the wearable glasses 1000.

The sensing unit 6400 may sense the status of the device 2000 or thestatus of the surrounding of the device 2000 and may transmitinformation corresponding to the sensed status to the controller 6300.

The sensing unit 6400 may include, but is not limited thereto, at leastone of a magnetic sensor 6410, an acceleration sensor 6420, atemperature/humidity sensor 6430, an infrared sensor 6440, a gyroscopesensor 6450, a position sensor (e.g., a GPS) 6460, a pressure sensor6470, a proximity sensor 6480, and an RGB sensor 6490 (i.e., anillumination sensor).

The communication unit 6500 may include at least one component thatenables the device 2000 to perform data communication with the wearableglasses 1000 or a server. For example, the communication unit 6500 mayinclude a short-range wireless communication unit 6510 (e.g.,short-range wireless communicator), a mobile communication unit 6520(e.g., mobile communicator), and a broadcasting reception unit 6530(e.g., broadcast receiver).

The short-range wireless communication unit 1510 may include, but is notlimited to, a Bluetooth communicator, a Bluetooth Low Energy (BLE)communicator, a near field communication (NFC) unit, a wireless localarea network (WLAN) (e.g., Wi-Fi) communicator, a ZigBee communicator,an infrared Data Association (IrDA) communicator, a Wi-Fi direct (WFD)communicator, an ultra wideband (UWB) communicator, and the like.

The mobile communication unit 6520 may exchange a wireless signal withat least one selected from a base station, an external terminal, and aserver on a mobile communication network. Examples of the wirelesssignal may include a voice call signal, a video call signal, and varioustypes of data generated during a short message service (SMS)/multimediamessaging service (MMS).

The broadcasting reception unit 6530 receives a broadcasting signaland/or broadcasting-related information from an external source via abroadcasting channel. The broadcasting channel may be a satellitechannel, a ground wave channel, or the like. According to one or moreother exemplary embodiments, the device 2000 may not include thebroadcasting reception unit 6530.

The A/V input unit 6600 inputs an audio signal or a video signal, andmay include a camera 6610 and a microphone 6620. The camera 6610 mayacquire an image frame, such as a still image or a moving picture, viaan image sensor in a video call mode or a photography mode. An imagecaptured via the image sensor may be processed by the controller 6300 ora separate image processor.

The image frame obtained by the camera 6610 may be stored in the memory6700 or transmitted to the outside via the communicator 6500. At leasttwo cameras 6610 may be included according to one or more exemplaryembodiments of the structure of a terminal.

The microphone 6620 receives an external audio signal and converts theexternal audio signal into electrical audio data. For example, themicrophone 6620 may receive an audio signal from an external device or aspeaking person. The microphone 6620 may use various noise removalalgorithms in order to remove noise that is generated while receivingthe external audio signal.

The memory 6700 may store a program used by the controller 6300 toperform processing and control, and may also store data that is input toor output from the device 2000.

The memory 6700 may include at least one type of storage medium fromamong a flash memory type, a hard disk type, a multimedia card microtype, a card type memory (for example, a secure digital (SD) or extremedigital (XD) memory), a random access memory (RAM), a static randomaccess memory (SRAM), a read-only memory (ROM), an electrically erasableprogrammable ROM (EEPROM), a programmable ROM (PROM), magnetic memory, amagnetic disk, and an optical disk.

The programs stored in the memory 6700 may be classified into aplurality of modules according to their functions, for example, a UImodule 6710, a touch screen module 6720, and a notification module 6730.

The UI module 6710 may provide a UI, a GUI, or the like that isspecialized for each application and interoperates with the device 2000.The touch screen module 6720 may detect a touch gesture on a touchscreen of a user and transmit information regarding the touch gesture tothe controller 6300. The touch screen module 6720 according to anexemplary embodiment may recognize and analyze a touch code. The touchscreen module 6720 may be configured by separate hardware including acontroller.

In order to detect the actual touch or the proximate touch on the touchpad, the touch screen may internally or externally have various sensors.An example of a sensor used to detect the real touch or the proximitytouch on the touch screen is a tactile sensor. The tactile sensordenotes a sensor that detects a touch by a specific object to a degreeto which a human feels or more. The tactile sensor may detect varioustypes of information, such as the roughness of a touched surface, thehardness of the touching object, the temperature of a touched point, andthe like.

Another example of a sensor used to detect the real touch or theproximity touch on the touch screen is a proximity sensor.

The proximity sensor is a sensor that detects the existence of an objectthat approaches a predetermined detection surface or that exists nearby,by using an electromagnetic force or infrared rays, without using anymechanical contact. Examples of the proximity sensor include atransmission-type photoelectric sensor, a direct reflection-typephotoelectric sensor, a mirror reflection-type photoelectric sensor, ahigh frequency oscillation-type proximity sensor, a capacity-typeproximity sensor, a magnetic proximity sensor, an infrared-typeproximity sensor, or the like. Examples of the touch gesture of the usermay include tap, touch and hold, double tap, drag, panning, flick, dragand drop, swipe, and the like.

The notification module 6730 may generate a signal for notifying that anevent has been generated in the device 2000. Examples of the eventgenerated in the device 2000 may include call signal receiving, messagereceiving, a key signal input, schedule notification, and the like. Thenotification module 6730 may output a notification signal in the form ofa video signal via the display 6210, in the form of an audio signal viathe audio output unit 6220, or in the form of a vibration signal via thevibration motor 6230.

An exemplary embodiment can also be embodied as a storage mediumincluding instruction codes executable by a computer such as a programmodule executed by the computer. A computer-readable recording mediumcan be any usable medium which can be accessed by the computer andincludes all volatile/non-volatile and removable/non-removable media.Further, the computer-readable recording medium may include all computerstorage and communication media. The computer storage medium includesall volatile/non-volatile and removable/non-removable media embodied bya certain method or technology for storing information such ascomputer-readable instruction code, a data structure, a program moduleor other data. The communication medium may include thecomputer-readable instruction code, the data structure, the programmodule, or other data of a modulated data signal such as a carrier wave,or other transmission mechanism, and includes any informationtransmission medium. It is understood that one or more of theabove-described elements may be implemented in or by at least oneprocessor, circuitry, a microprocessor, etc.

Although exemplary embodiments have been disclosed for illustrativepurposes, one of ordinary skill in the art will appreciate that diversevariations and modifications are possible, without departing from thespirit and scope of the present inventive concept. Thus, theabove-described exemplary embodiments should be understood not to berestrictive but to be illustrative, in all aspects. For example,respective elements described in an integrated form may be dividedlyused, and the divided elements may be used in a state of being combined.

The above exemplary embodiments should be considered in descriptivesense only and not for purposes of limitation. Descriptions of featuresor aspects within each exemplary embodiment should typically beconsidered as available for other similar features or aspects in otherembodiments.

While exemplary embodiments have been particularly shown and describedabove, it will be understood by those of ordinary skill in the art thatvarious changes in form and details may be made therein withoutdeparting from the spirit and scope of the present invention as definedby the following claims.

What is claimed is:
 1. Wearable glasses comprising: a display configuredto display an image; a sensor configured to acquire information about aneye of a user wearing the wearable glasses while the image is displayedon the display; and a processor configured to: determine at least one ofa movement direction and a movement distance of the wearable glasseswith respect to the eye of the user based on the information about theeye of the user, detect a change in a size of a pupil of the user basedon the information about the eye of the user, adjust a size of theimage, based on at least one of the movement direction and the movementdistance of the wearable glasses with respect to the eye of the user,adjust brightness of the image based on the change in the size of thepupil, and control the display to display the image of which both thebrightness and the size are adjusted based on a movement of the wearableglasses and the change in the size of the pupil.
 2. The wearable glassesof claim 1, wherein: the sensor is configured to acquire informationabout a body part of the user, wherein the processor is configured todetermine an inclination of the wearable glasses with respect to theuser by comparing the information about the body part of the user withpredetermined reference wear state information.
 3. The wearable glassesof claim 2, wherein: the sensor is configured to acquire an image of thebody part; and the processor is configured to: detect an areacorresponding to the body part from the image of the body part, acquirea property value from the detected area, and compare the property valuewith a reference value included in the predetermined reference wearstate information in order to determine the inclination.
 4. The wearableglasses of claim 1, wherein: the information about the eye of the usercomprises an image of the eye, and the processor is configured to:acquire at least one value from among a length of a major axis of theeye, a length of a minor axis of the eye, an angle of the major axis ofthe eye, an angle of the minor axis of the eye, and a location value ofan iris of the user from the image of the eye, compare the at least onevalue with at least one predetermined reference value, and determine aninclination of the wearable glasses with respect to the user based on aresult of comparing the at least one value with the at least onepredetermined reference value.
 5. The wearable glasses of claim 1,wherein: the display is configured to display a test image; the sensoris configured to acquire an image of the eye on which the test image isreflected; and the processor is configured to: detect an areacorresponding to the eye of the user from the image of the eye, obtain areflection image which is formed by reflection of the test image on theeye of the user within the detected area corresponding to the eye,compare the at least one of a size and a shape of the reflection imagewith predetermined reference wear state information, and determine aninclination of the wearable glasses with respect to the user based on aresult of comparing the at least one of the size and the shape of thereflection image with the predetermined reference wear stateinformation.
 6. The wearable glasses of claim 1, wherein the sensor isconfigured to obtain a state value representing a movement state of thewearable glasses, and the processor is configured to determine aninclination of the wearable glasses with respect to the user when thestate value is equal to or greater than a predetermined value.
 7. Thewearable glasses of claim 1, wherein the processor is configured to:determine whether an inclination of the wearable glasses with respect tothe user is equal to or greater than a predetermined value, control thedisplay to adjust the image based on the inclination if the inclinationis less than the predetermined value, and control the display to displayan image informing the user to adjust a position of the wearable glassesif the inclination is equal to or greater than the predetermined value.8. A method of displaying an image via wearable glasses, the methodcomprising: displaying, on a display of the wearable glasses, an image;acquiring information about an eye of a user wearing the wearableglasses while the image is displayed on the display; determining atleast one of a movement direction and a movement distance of thewearable glasses with respect to the eye of the user based on theinformation about the eye of the user; detecting a change in a size of apupil of the user based on the information about the eye of the user;adjusting a size of the image, based on at least one of the movementdirection and the movement distance of the wearable glasses with respectto the eye of the user; adjusting brightness of the image based on thechange in the size of the pupil; and displaying the image of which boththe brightness and the size are adjusted based on a movement of thewearable glasses and the change in the size of the pupil.
 9. The methodof claim 8, further comprising: acquiring information about a body partof the user; and determining an inclination of the wearable glasses withrespect to the user by comparing the information about the body partwith predetermined reference wear state information.
 10. The method ofclaim 9, wherein: the information about the body part comprises an imageof the body part; and the determining the inclination comprises:detecting an area corresponding to the body part from the image of thebody part, acquiring a property value from the detected area, andcomparing the property value with a reference value included in thepredetermined reference wear state information in order to determine theinclination.
 11. The method of claim 8, further comprising: displaying atest image; acquiring an image of the eye of the user on which the testimage is reflected; detecting an area corresponding to the eye of theuser from the image of the eye, obtaining a reflection image which isformed by reflection of the test image on the eye of the user within thedetected area corresponding to the eye, comparing the at least one of asize and a shape of the reflection image with predetermined referencewear state information, and determining an inclination of the wearableglasses with respect to the user based on a result of the comparing. 12.The method of claim 8, further comprising: obtaining a state valuerepresenting a movement state of the wearable glasses; and determine aninclination of the wearable glasses with respect to the user when thestate value is equal to or greater than a predetermined value.
 13. Themethod of claim 8, further comprising: determining whether aninclination of the wearable glasses with respect to the user is equal toor greater than a predetermined value; if the inclination is equal to orgreater than the predetermined value according to the determining,displaying an image informing the user to adjust a position of thewearable glasses; and if the inclination is less than the predeterminedvalue according to the determining, adjusting the displayed image, basedon the inclination.
 14. The wearable glasses of claim 1, wherein theprocessor is configured to: increase the brightness when the size of thepupil increases, and decrease the brightness when the size of the pupildecreases.
 15. The wearable glasses of claim 1, wherein, the processoris configured to: adjust a location of the image such that the image ismoved in a direction opposite to the movement direction of the wearableglasses and by a distance corresponding to the movement distance of thewearable glasses.
 16. The wearable glasses of claim 1, wherein theprocessor is configured to: in response to a distance from the eye ofthe user to the image being increased according to the movement distanceof the wearable glasses, increase the size of the image based on theincreased distance.
 17. A non-transitory computer-readable storagemedium having embodied thereon at least one program including commandsfor performing a method of displaying an image via wearable glasses,wherein the method comprises: displaying an image that is provided bythe wearable glasses; acquiring information about an eye of a userwearing the wearable glasses while the image is displayed on thedisplay; determining at least one of a movement direction and a movementdistance of the wearable glasses with respect to the eye of the userbased on the information about the eye of the user; detecting a changein a size of a pupil of the user based on the information about the eyeof the user; adjusting a size of the image, based on at least one of themovement direction and the movement distance of the wearable glasseswith respect to the eye of the user; adjusting brightness of the imagebased on the change in the size of the pupil; and display the imagewhich both the brightness and the size are adjusted based on a movementof the wearable glasses and the change in the size of the pupil.
 18. Thenon-transitory computer-readable storage medium of claim 17, wherein themethod further comprises: acquiring information about a body part of theuser; and determining an inclination of the wearable glasses withrespect to the user by comparing, the information about the body partwith predetermined reference wear state information.
 19. Thenon-transitory computer-readable storage medium of claim 18, wherein theinformation about the body part comprises an image of the body part ofthe user; and the determining the inclination comprises: detecting anarea corresponding to the body part from the image of the body part,acquiring a property value from the detected area, and comparing theproperty value with a reference value included in the predeterminedreference wear state information in order to determine the inclination.20. The non-transitory computer-readable storage medium of claim 17,wherein the method further comprises: displaying a test image; acquiringan image of the eye of the user on which the test image is reflected;detecting an area corresponding to the eye of the user from the image ofthe eye, obtaining a reflection image which is formed by reflection ofthe test image on the eye of the user within the detected areacorresponding to the eye, comparing the at least one of a size and ashape of the reflection image with predetermined reference wear stateinformation, and determining an inclination of the wearable glasses withrespect to the user based on a result of the comparing.
 21. Thenon-transitory computer-readable storage medium of claim 17, wherein themethod further comprises: determining whether an inclination of thewearable glasses with respect to the user is equal to or greater than apredetermined value; and based on the inclination being less than thepredetermined value according to the determining, adjusting thedisplayed image, based on the inclination.